RFLOXA Ultra43 USD front fork, 251 mm travel, 27 lbs spring – Sur-Ron Ultra Bee

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RFLOXA Ultra43 USD front fork, 251 mm travel, 27 lbs spring – Sur-Ron Ultra Bee

Race-grade upside-down fork for the Sur-Ron Ultra Bee: ∅43 mm tubes, 251 mm travel, DLC coating, SKF seals, Hollow Triple Clamp in AL6061-T6 CNC. Full HSC/LSC/rebound/preload adjustment. 27 lbs spring (75–105 kg) included.

USD1,917.20

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RFLOXA Ultra43 USD fork for the Sur-Ron Ultra Bee

Race suspension

RFLOXA Ultra43 – USD front fork

∅43 mm tubes, 251 mm travel, DLC coating and full damping adjustment. No more bottoming out the front in rough terrain.

The stock Ultra Bee front end is a compromise that stops working exactly when you start riding faster: it bottoms on landings, dives under braking and twists in ruts. The Ultra43 solves all three at once – reinforced ∅43 mm tubes, 251 mm of travel and a skeletonised Hollow Triple Clamp machined in one piece from aerospace AL6061-T6.

The DLC coating on the stanchions cuts friction far enough that the fork moves on small bumps instead of passing them to the bars. SKF seals are what keeps it that way beyond one season. The symmetrical Dual Spring layout means the left and right legs work independently and identically – no front-end twist under load.

Which spring for your weight?

Spring	Rider weight with gear	Note
24 lbs	65–85 kg	To order – write to us first
27 lbs	75–105 kg	Included – the version on this listing
30 lbs	95–135 kg	To order – write to us first

Spring rate matched to your weight is not cosmetic – the wrong rate ruins sag and makes every damping setting useless. If your weight sits near a range boundary, write to us: we will spec it against your riding style, not just the kilograms.

What's in the box

Complete RFLOXA Ultra43 fork

DLC-coated stanchions, SKF seals, 55CRSI 27 lbs spring, lower legs and dropouts in AL6061-T6 CNC

Hollow Triple Clamp

Reinforced, skeletonised, fully CNC-machined from AL6061-T6. Zinc-plated corrosion-resistant fasteners to EU standard

Check this before ordering

The fork is designed around a ∅240 mm brake disc and a 78.5 mm caliper mount spacing. If your front end uses a different disc or spacing, you will need a disc change or an adapter. Send us a photo of your caliper and we will confirm before shipping.

DLC-coated stanchions with SKF seals – low friction from the first millimetre of travel

Skeletonised Hollow Triple Clamp in aerospace AL6061-T6 CNC

Technical data

Bike	Sur-Ron Ultra Bee
Construction	Upside-down, oil and spring, symmetrical Dual Spring internals
Travel	251 mm
Overall length	850 mm
Tube diameter	∅43 mm, reinforced
Caliper mount spacing	78.5 mm
Brake disc	∅240 mm (dedicated)
Coating	DLC (Diamond-Like Carbon)
Seals	SKF
Spring	55CRSI steel, 27 lbs included
High-speed compression	30 clicks
Low-speed compression	10 clicks
Rebound	18 clicks
Preload	17 clicks
Materials	AL6061-T6 CNC, zinc-plated EU-standard fasteners

Four independent adjustment ranges give you a real ability to set the front end up for a specific track – this is a tuning tool, not a fit-and-forget fork.

Sur-Ron Ultra Bee251 mm travel∅43 mm tubesDLC coating

Before you order

Weigh yourself in full gear and check the spring table – this is the most important decision in this purchase.
Check your front disc diameter and caliper mount spacing (fork: 240 mm, 78.5 mm).
Allow time for the first setup session. Out of the box the fork is set to factory, not to you.
A front-end change is a good moment to look at the rear – the RFLOXA RAF55RV shock is linked below.

Frequently asked

Is it a big difference from the stock fork?

Yes, and you feel it most in two situations: on hard landings (30 clicks of high-speed compression stop the front bottoming out) and braking into a corner (10 clicks of low-speed compression limit the dive).

Do I need a new brake disc?

The fork is built around a ∅240 mm disc and a 78.5 mm caliper spacing. If that matches your setup, no. If not, yes. Write to us and we will check it together.

I weigh 110 kg with gear – what should I take?

The 30 lbs spring (95–135 kg range), not the 27 lbs on this listing. Contact us before ordering and we will prepare the correct variant.

What does the DLC coating do?

It reduces friction between the sliding surfaces. In practice the fork starts responding to small bumps the stock unit simply passes through – and less of that reaches your wrists.

Finish the suspension

RFLOXA RAF55RV rear shock

Same manufacturer, rear end. External reservoir, oil and gas separation, DLC coating. Front and rear from one family work together.

550 lbs rear spring

Matching rear spring rate to your weight matters just as much as it does at the front.

Rear shock cover

A small amount of money that keeps sand and stones off the shock shaft.

Not sure which spring to pick?

Send us your weight in full gear and your riding style – we will spec the variant. Shipped from Poland.

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