ULTRON WR SET
ULTRON S3 + ULTRON DISC
Two wheels. One pursuit. Speed.
The three-spoke ULTRON S3 at the front. The ULTRON Disc at the rear. Two distinctive aerodynamic designs brought together in a race setup built for triathlon and time trial performance.
In stock
World wide shipping in 3-10 days
3
hours
53
minutes
12
seconds
ULTRON S3 + ULTRON DISC · WORLD RECORD SET
The wheels that made IRONMAN history.
Robert Kallin. IRONMAN Kalmar. 3:53:12.
At IRONMAN Kalmar 2026, Robert Kallin set the fastest bike split ever recorded in an IRONMAN race, riding the RON ULTRON S3 front wheel and ULTRON Disc rear wheel.
Explore the wheel combination that was part of his historic performance — and make it part of your next race.
ULTRON S3
At the front of a historic ride.
THREE WIDE, WING-SHAPED SPOKES. A VARIABLE-DEPTH OCT AERO RIM. A CARBON CONSTRUCTION DEVELOPED AROUND AERODYNAMIC PERFORMANCE.
85–95 MM VARIABLE RIM DEPTH — THE DISTINCTIVE OCT AERO PROFILE.
24 MM INTERNAL WIDTH — DESIGNED AROUND 28–30 MM TYRES.
UP TO 34 MM EXTERNAL WIDTH — A WIDE AERODYNAMIC PROFILE.
ENDURO CERAMIC BEARINGS — SUPPORTING SMOOTH WHEEL ROTATION.
TUBELESS HOOKED CONSTRUCTION — READY FOR A COMPATIBLE TUBELESS SETUP.
ULTRON Disc
The rear wheel behind the record.
Its full-disc construction and AIRlense ULTRA lenticular profile create a distinctive aerodynamic shape. The wide rim, ceramic bearings and ratchet hub complete a wheel developed for the demands of triathlon and time trial racing.
- AIRlense ULTRA — the defining lenticular disc geometry.
- 10 XAS panels —
create controlled turbulence to reduce aerodynamic drag. - Wide rim profile — making tyre selection part of the complete setup.
- Ceramic bearings — supporting smooth rotation.
- Ratchet hub — transferring your effort to the rear wheel.
Product specification
front / rear
940g / 1080g
24mm / 22mm
31 mm / 31 mm
28–30 mm
Hooked tubeless (clincher)
Disc brakes- centerlock mount
12x100 mm / 12x142 mm thru axle
Enduro Ceramic
What’s Included
30
DAYS FREE RETURN
2
YEARS INTERNATIONAL WARRANTY
Testimonials
Bigjuergo
RON rearwheel solid and fast
I am absolutely happy with the wheel so far.
fits prefect to my Canyon Speedmax SLX 8.0 (disc breaks)
the price for value is good. i can recommend this wheel.
wheel is solid and has nice sound when accelerating.
i ride it with 28-10 SRAM casset
Kimpale
ULTRON Disc
Super happy with the disc. Light and extremely fast! Beteer than the other expensive brands. You should be proud what you have done with this one!
I`m thinkin of getting the 85 front wheel to complete my race wheel set.
ArtemSekachev
Good wheel!
Smooooth and fast, highly recommended!
Antonio
great product and timing on delivery
Product precisely as described and super timing for delivery
FAQ
Find answers to common questions about our products, orders, shipping, and support.
Can i return my order?
Yes, we offer 30-DAY SATISFACTION GUARANTEE – you can return your order for free.
Do RON ship international?
Yes, we ship all over the world with DHL Express.
Shipping costs will apply, and will be added at checkout.
How long will it take to get my orders?
If your wheels are in stock we aim to have them shipped within 1-3 days. Shipping takes 3-10 days.
Taxes and import duties
All shipments out of EU will incur duties and taxes charged to the end customer via DHL.
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