The short version
The RFLOXA Ultra43 fork and RAF55RV rear shock are a real upgrade for the Sur-Ron Ultra Bee, but RFLOXA's spring-rate ranges are tuned for fast, aggressive riding. If you ride technical trails, buy one spring rate lighter than RFLOXA's chart suggests. Charged Cycle Works (CCW) tested this suspension twice, in rocky single-track and in fast open terrain, and built a spring chart that separates trail riders from race riders.
If you read nothing else, use these two charts. Pick your springs from the first, then set your clickers from the second. Both are explained in full further down.
CCW Spring Rate Chart for RFLOXA Ultra Bee Suspension
| Fork | Shock | Trail (30% sag) | Race (25% sag) | RFLOXA |
|---|---|---|---|---|
| 24 lb | 450 lb | 150–200 lb | 140–165 lb | 143–187 lb |
| 27 lb | 550 lb | 200–250 lb | 165–200 lb | 165–231 lb |
| 30 lb | 650 lb | 250+ lb | 200+ lb | 209–298 lb |
CCW Corrected Clicker Settings (Motocross Standard, Count from Full In)
Turn each adjuster clockwise until it stops, then back it out and count clicks out. These numbers are CCW's, not RFLOXA's; RFLOXA counts the opposite direction.
| Adjuster (total) | Comfort | Performance | Track |
|---|---|---|---|
| Fork rebound (18) | 11 | 9 | 7 |
| Fork HSC (30) | 18 | 15 | 10 |
| Fork LSC (10) | 7 | 5 | 3 |
| Shock rebound (20) | 12 | 10 | 8 |
| Shock HSC (22) | 13 | 10 | 8 |
| Shock LSC (3 turns) | 2.5 turns | 2 turns | 1.25 turns |
All values are clicks out from fully closed. HSC = high-speed compression, LSC = low-speed compression. The number in parentheses is the adjuster's total range.
Key facts
- Product: RFLOXA Ultra43 inverted front fork (43 mm tubes, 251 mm travel) and RFLOXA RAF55RV rear shock (85 mm stroke, external nitrogen reservoir), both made only for the Sur-Ron Ultra Bee.
- Spring options: fork 24 lb / 27 lb / 30 lb; shock 450 lb / 550 lb / 650 lb. Fork and shock springs are paired: 24/450 is light, 27/550 is medium, 30/650 is heavy.
- What RFLOXA says: 24/450 for 65–85 kg riders, 27/550 for 75–105 kg, 30/650 for 95–135 kg. The ranges overlap by 10 kg, and neither the product pages nor the user manuals say which riding style they assume.
- What CCW found: the medium 27/550 setup was harsh and stiff on rocky technical trails, and the problem was the springs, not the clickers. The same setup worked well in fast open terrain with a 200 lb rider.
- RFLOXA's clicker numbers count backwards from the motocross convention. RFLOXA counts clicks in from fully open; the rest of the industry counts clicks out from fully closed. A setting like "12 clicks" means opposite things in the two systems. CCW's tables below give both.
- CCW recommendation: trail riders set 30% sag and pick from the trail column of the chart below; race and motocross-style riders set 25% sag and pick from the race column. A 200 lb rider is the crossover point: 24/450 for trail, 27/550 for race.
- Springs are swappable. If you already own RFLOXA suspension and it feels too stiff, you can change springs without replacing the fork or shock. CCW will publish a spring-swap video.
- Sources: RFLOXA Ultra43 product page, RFLOXA RAF55RV product page, Ultra43 user manual (PDF), RAF55RV user manual (PDF), and CCW's own ride testing in September 2026.
Who is RFLOXA Ultra Bee suspension for?
RFLOXA is the mid-range choice for Ultra Bee riders on a budget who have outgrown the stock suspension and want more support and holdup. It is not for everyone, and the two ends of the spectrum are better served elsewhere.
How it differs from stock. The OEM Ultra Bee suspension is ultra-soft and plush. It is comfortable at slow trail speeds, and it dives, wallows and bottoms as soon as the pace or the rider weight goes up. RFLOXA goes the other direction: stiffer springs and firmer valving that hold the bike up in its stroke under braking, on jump faces and through big hits. The two feel nothing alike, and that is the point. A rider moving from stock to RFLOXA should expect a firmer, more planted bike, not a plusher one.
- Stock Ultra Bee suspension: ultra-soft, plush, comfortable. Best for slower trail riders, lighter riders, and comfort over speed. Limited adjustability. Included with the bike.
- RFLOXA Ultra43 + RAF55RV: firm, supportive, holds up under load. Best for riders who want support and holdup on a budget: trail riders on the right spring, race riders on the stiffer spring. Medium adjustability (preload, rebound, high- and low-speed compression), but the damping and clicker performance does not match premium choices. Mid-range price.
- Sirris: premium performance and tunability. Best for riders who want the best-performing, most tunable setup and are willing to pay for it. Full adjustability with premium valving and support. Premium price.
If you are a slower trail rider who values comfort over speed, you may prefer the stock suspension. RFLOXA on the lighter spring at 30% sag is livable on trails, but it will never be as cushy as OEM, and if plushness is what you want, you will not be happier for spending the money.
If you want the most performance and tunability and budget is not the deciding factor, step up to Sirris. It is the premium option CCW recommends for riders chasing the last bit of performance and adjustability. From hard enduro marsh-mellow to Arena Cross Sirris has settings for everything.
If you are in the middle, which is most Ultra Bee owners who ride hard enough to feel the stock suspension give up, RFLOXA on the right spring is the sweet spot. Pick the spring from the chart, set sag, and it will be a big step up from stock without the premium price of Sirris.
What the RFLOXA Ultra Bee suspension is
RFLOXA sells two Ultra Bee components, sold separately and normally bought as a pair. Both are fully adjustable: preload, rebound, high-speed compression and low-speed compression. Both use DLC-coated sliding surfaces and 55CrSi spring wire.
| Spec | Ultra43 front fork | RAF55RV rear shock |
|---|---|---|
| Fitment | Sur-Ron Ultra Bee only | Sur-Ron Ultra Bee only |
| Type | Inverted (upside-down) fork, dual spring, symmetric left/right internals | Coil-over shock with external nitrogen reservoir, oil/gas separated |
| Travel | 251 mm | 85 mm shock stroke |
| Key dimensions | 43 mm tubes, 850 mm center distance, 240 mm rotor, 78.5 mm caliper mount spacing | 320 mm eye-to-eye, 40 mm piston, 16 mm shaft |
| Materials | AL6061-T6 CNC fork lowers, CNC dropouts, CNC hollow triple clamp, zinc-nickel fasteners, SKF seals | AL7075-T6 body, 42CrMo shaft, AL6061-T6 CNC top mount |
| Rebound adjustment | 18 clicks | 20 clicks |
| High-speed compression | 30 clicks | 22 clicks (outer silver knob) |
| Low-speed compression | 10 clicks | 3 turns (inner red knob) |
| Preload | 17 clicks | Threaded collar |
| Spring options | 24 lb, 27 lb, 30 lb | 450 lb, 550 lb, 650 lb |
| CCW price (Sep 2026) | $1,526 | $650 |
Spring rates are matched across the two: 24 lb fork with 450 lb shock, 27 lb with 550 lb, 30 lb with 650 lb. RFLOXA's own launch coverage positioned the pair for riders "who often ride off-road, on rough or fast terrain" who want an upgrade "without falling into a very high budget or overly 'race' solutions" (MXE). Other dealers describe it as built for "aggressive trail riding, enduro, and off-road use" (GritShift). Neither description tells you which spring to buy for which kind of riding.
Buy at CCW: RFLOXA Ultra43 fork and RFLOXA RAF55RV shock.
What RFLOXA tells you, and what it leaves out
RFLOXA gives you a rider-weight range per spring and a set of clicker ranges, but never says what kind of riding those numbers assume. That gap is why a trail rider following RFLOXA's chart ends up on springs that are too stiff.
RFLOXA's published spring guidance (from the product pages):
| Fork / shock spring | RFLOXA rider weight |
|---|---|
| 24 lb / 450 lb | 65–85 kg (143–187 lb) |
| 27 lb / 550 lb | 75–105 kg (165–231 lb) |
| 30 lb / 650 lb | 95–135 kg (209–297 lb) |
Each band overlaps the next by 10 kg (22 lb). A 200 lb rider sits inside both the medium and heavy band with no tiebreaker.
What the user manuals add. The Ultra43 and RAF55RV manuals say preload should be set "according to rider's weight and bike sag" and that sag "should not exceed 25% of total (shock) travel." There is no spring-selection table in either manual. The clicker tables label their ranges Comfort, Performance and Track:
RFloXa Clicker Settings (backwards and too generic)
| Adjuster (total) | Comfort | Performance | Track |
|---|---|---|---|
| Fork rebound (18) | 1–6 | 6–12 | 12–18 |
| Fork HSC (30) | 1–10 | 10–20 | 20–30 |
| Fork LSC (10) | — | 4–7 | 7–10 |
| Shock rebound (20) | 1–7 | 8–14 | 15–20 |
| Shock HSC (22) | — | 9–15 | 16–22 |
| Shock LSC (3 turns) | 1 turn | 2 turns | 3 turns |
HSC = high-speed compression, LSC = low-speed compression. RFLOXA labels the shock rebound Comfort range "Responsive."
RFLOXA counts clicks backwards. Every number in that table is counted in from fully open (fully counterclockwise, softest). The motocross and enduro world does the opposite: turn the adjuster fully in (clockwise, closed), then back it out and count clicks out. Nothing in the manual says which convention it uses; CCW confirmed it on the bench. So RFLOXA's "6 clicks" of fork rebound is 12 clicks out in normal language, and a rider who sets 6 clicks out the usual way ends up near RFLOXA's Track setting when they wanted Comfort. The same table converted to the industry convention (clicks out from fully closed; total minus RFLOXA's number, allow one click either way):
CCW Corrected Clicker Settings (Motocross Standard, Count from Full In)
| Adjuster (total) | Comfort | Performance | Track |
|---|---|---|---|
| Fork rebound (18) | 11 | 9 | 7 |
| Fork HSC (30) | 18 | 15 | 10 |
| Fork LSC (10) | 7 | 5 | 3 |
| Shock rebound (20) | 12 | 10 | 8 |
| Shock HSC (22) | 13 | 10 | 8 |
| Shock LSC (3 turns) | 2.5 turns | 2 turns | 1.25 turns |
All values are clicks out from fully closed. HSC = high-speed compression, LSC = low-speed compression.
What is missing. Four things a buyer needs are not in RFLOXA's materials: which riding style the weight bands assume, what to do when your weight falls in an overlap, the fact that clickers cannot fix a spring that is wrong for your weight and terrain, and which direction the click counts run. The manual and the product page also disagree on the rear shock: the manual calls the 3-turn inner red knob low-speed compression and the 22-click outer silver knob high-speed, while the product page lists them the other way around. The 25% sag ceiling in the manual is a race-oriented number; trail riders generally run more sag for compliance over rocks and roots.
How CCW tested it: two rides, same springs, opposite results
We rode the RFLOXA Ultra43 and RAF55RV on the medium 27 lb / 550 lb springs RFLOXA recommends for our weight, first on rocky technical trail and then on a fast open trail system. The springs never changed. The terrain and rider did, and that flipped the verdict.
Ride 1: rocky technical single-track, medium springs. The suspension was harsh from the first mile. It transmitted rocks and ledges into the rider instead of absorbing them, and every stop turned into a conversation about how stiff it felt. We backed off compression on the trail and it did not help, because the clickers were not the problem. The spring rate was too high for the rider weight and the speed that terrain allows. At trail speeds the suspension never moved far enough into its stroke to work.
Back in the shop. We compared RFLOXA's weight bands against spring rates from our own database built on 3 years of racing and riding experience on the Ultra Bee. RFLOXA's bands were similar with a race-style setup: less sag, stiffer spring, built for hard hits at speed. Nothing in the manual or on the website says that, so a trail rider using RFLOXA's chart gets a motocross setup by default, completely the wrong setup!
Ride 2: fast open terrain, 200 lb rider, same medium springs. In faster terrain that rewards aggressive riding, with a heavier rider on board, the same 27 lb / 550 lb setup came alive. The extra rider weight and higher speeds pushed the suspension into the part of its stroke it was built for, and it was stable, controlled and predictable. This is the setup RFLOXA's chart is actually describing.
What that means. The suspension is good, but the settings published by the manufacturer are bad. The recommendation is incomplete. Spring choice has to account for rider weight, terrain and riding style together, and RFLOXA's chart covers only the first. The rider lineup in the video shows this in practice: several CCW riders of different weights and riding styles each state their weight, pick a spring, measure sag, and hear our recommendation back.
CCW spring rate chart for RFLOXA Ultra Bee suspension
Pick your column by how you ride, then find your weight. Trail riders target 30% sag; race and motocross-style riders target 25% sag. The RFLOXA column is the manufacturer's range, shown for comparison.
| Fork | Shock | Trail (30% sag) | Race (25% sag) | RFLOXA |
|---|---|---|---|---|
| 24 lb | 450 lb | 150–200 lb | 140–165 lb | 143–187 lb |
| 27 lb | 550 lb | 200–250 lb | 165–200 lb | 165–231 lb |
| 30 lb | 650 lb | 250+ lb | 200+ lb | 209–298 lb |
Read it this way:
- A 180 lb trail rider buys 24 lb / 450 lb. RFLOXA's chart would put the same rider on 24/450 or 27/550, and most buyers pick the stiffer option "to be safe." On rocky trails that is the wrong call.
- A 180 lb race rider buys 27 lb / 550 lb. That matches RFLOXA's medium band, which is why RFLOXA's chart works for aggressive riders.
- A 200 lb rider is the crossover: 24/450 for trail, 27/550 for race. If you split time between both, choose by the terrain you ride most, and expect to run more preload on the lighter spring for race days.
- Above 250 lb, buy 30 lb / 650 lb regardless of style. Above 200 lb and racing, also 30/650.
- If you are on the border between two rows, the lighter spring plus a few clicks of preload almost always rides better than the heavier spring with preload backed all the way out.
Weight in this chart is rider weight; add your riding gear if you ride with a pack, armor or a heavy helmet, since that weight sits on the bike too. The same chart is on the CCW product pages for the Ultra43 fork and the RAF55RV shock.
How to set up RFLOXA suspension for your weight and riding
Spring rate is decided by three things together: rider weight, terrain, and riding style. Get the spring right first, then use sag to confirm it, then use the clickers to fine-tune. Doing it in any other order wastes time.
1. Define your riding. Trail riding means technical single-track, rocks, roots, slower speeds and frequent small hits; you want the suspension to move early and often. Race or aggressive riding means motocross tracks, jumps, high speeds and big hits; you want the suspension to hold up under load. Most Ultra Bee owners are trail riders even if they ride hard.
2. Pick the spring from the chart. Use the trail column for 30% sag or the race column for 25% sag. When in doubt between two rows, take the lighter spring.
3. Set sag and check the spring. Rider sag is how far the suspension compresses under the rider's weight, in riding position, as a percentage of travel. On the Ultra43 fork, 30% of 251 mm is about 75 mm and 25% is about 63 mm. On the RAF55RV shock, 30% of the 85 mm stroke is about 25 mm and 25% is about 21 mm, measured at the shock. Adjust preload to hit your target. If you need nearly all the preload to reach the number, the spring is too soft; if sag is still under target with preload fully backed off, the spring is too stiff. Either way, change the spring.
4. Then use the clickers, and count them the right way. Before touching a number from RFLOXA's manual, know that RFLOXA counts clicks in from fully open, while every motocross and enduro reference counts clicks out from fully closed. To set any RFLOXA clicker the standard way: turn the adjuster clockwise until it stops (fully closed), then back it out counterclockwise and count clicks out. Use the converted table above, or convert yourself: clicks out = total clicks minus RFLOXA's number. Trail riders start in the Comfort range on high-speed compression and rebound, which is 12 to 17 clicks out on fork rebound and 20 to 29 clicks out on fork high-speed compression; race riders start in Performance and move toward Track. Never run an adjuster past its stop in either direction. Clickers adjust how fast the suspension moves. They cannot change how much force it takes to move it, and that is the spring's job.
5. Already own it and it feels too stiff? Swap the springs. The fork and shock both accept the lighter rates without other changes, and CCW will publish a step-by-step spring-swap video. You do not need to replace the suspension.
Frequently asked questions
Is RFLOXA suspension good for the Sur-Ron Ultra Bee? Yes. The Ultra43 fork and RAF55RV shock are a well-built, fully adjustable upgrade with 251 mm of fork travel, DLC coatings and independent high-speed and low-speed compression, rebound and preload. The one thing to get right is the spring rate, which RFLOXA's chart does not explain well for trail riders.
Is RFLOXA better than the stock Ultra Bee suspension, and how does it compare to Sirris? RFLOXA is firmer and more supportive than the ultra-soft, plush stock suspension, with stiffer springs and valving that hold the bike up under load. It is the mid-range, budget-friendly upgrade. Slower trail riders who prioritize comfort may prefer stock. Riders who want the highest performance and tunability should step up to Sirris, CCW's premium recommendation.
Which RFLOXA spring rate should I buy for the Ultra Bee? Trail riders: 24 lb fork / 450 lb shock up to 200 lb, 27 lb / 550 lb from 200 to 250 lb, 30 lb / 650 lb above 250 lb. Race and motocross-style riders: 24/450 for 140–165 lb, 27/550 for 165–200 lb, 30/650 above 200 lb.
Why does the RFLOXA suspension feel too stiff? Because the spring rate is too high for your weight and terrain. RFLOXA's recommended weight ranges assume aggressive, high-speed riding at 25% sag. On technical trails at lower speeds the suspension never gets deep enough into its travel. Softening the compression clickers will not fix it; changing to a lighter spring will.
Is the medium 27 lb / 550 lb spring right for a 200 lb rider? Only for racing or aggressive open-terrain riding. A 200 lb trail rider should run the 24 lb / 450 lb springs at 30% sag.
What sag should I run on RFLOXA Ultra Bee suspension? 30% rider sag for trail riding and 25% for racing. RFLOXA's manual states sag "should not exceed 25% of total travel," which is a race-oriented number.
Can I change the springs on the RFLOXA Ultra43 fork and RAF55RV shock? Yes. Both accept the other two spring rates without replacing the fork or shock. CCW will publish a spring-swap video showing the procedure.
Does RFLOXA say what riding style its recommended settings are for? No. The product pages give rider-weight ranges only, and the user manuals give clicker ranges labeled Comfort, Performance and Track without tying them to a spring choice. CCW's chart adds the missing trail-versus-race distinction.
Which way do the RFLOXA clickers count? RFLOXA's numbers count clicks in from fully open (fully counterclockwise). The motocross convention, and every other suspension brand's setup sheet, counts clicks out from fully closed (fully clockwise). To use a RFLOXA number the standard way, subtract it from the adjuster's total: RFLOXA's 6 clicks of fork rebound (18 total) is 12 clicks out. The manual does not state this; CCW confirmed it on the bench.
Why does my RFLOXA suspension feel harsh even on the softest recommended clicker setting? You may have set it backwards. If you took RFLOXA's Comfort number and counted it out from fully closed, you landed near the Track setting. Reset the adjuster fully open, count in by RFLOXA's number, or use CCW's converted table. If it is still harsh after that, the spring is too stiff.
Where do I buy RFLOXA suspension for the Ultra Bee? Charged Cycle Works stocks all three spring rates of both the Ultra43 fork and the RAF55RV shock, ships from North Salt Lake, Utah, and will help you pick the spring before you order.
Watch the video and get set up
The full test, both rides and the rider lineup, is in our YouTube video: RFLOXA Suspension: What the Manual Doesn't Tell Ultra Bee Riders, published September 27, 2026. The spring chart above is also on the CCW product pages so you can check it at checkout.
If you are not sure which row you fall in, tell us your weight and where you ride and we will pick the spring with you: call, use the chat on chargedcycleworks.com, or email orders@chargedcycleworks.com. Comment on the video with your own RFLOXA setup, sag numbers and terrain; the more real-world data points we collect, the better this chart gets.
About Charged Cycle Works: CCW is an eMoto specialist in North Salt Lake, Utah, with an online store, a Salt Lake City showroom, and an in-house R&D and suspension service team. We test the parts we sell before we recommend them.