[Bikes]

NEW PRODUCT: PROX ULTRA LIGHTWEIGHT STEEL SPROCKET

6 months ago | Words: Miller Mendham | Photos: Pro X

The age old question of weight versus durability in regards to sprocket’s has been answered. With an all new strong but yet lightweight design the steel sprockets from ProX are sure to make your bike not only look the treat, but perform the way it was built to! Check out the in-depth piece from ProX themselves:

From cruising trails with buddies to serious off-road and on-track racing, ProX sprockets have delivered impressive durability, especially in steel construction. ProX steel rear sprockets have been proven in highly demanding racing situations, including worldwide Enduro as well as GNCC and Hare and Hound in the U.S. While they last beyond what may even seem possible sometimes, the main disadvantage for steel has always been the extra weight in comparison to ProX aluminum sprockets.

dirt bike sprockets and chain
A new Ultralight sprocket paired-up with a gold X-ring chain, countershaft sprocket, and new sprocket hardware.

ProX engineers set out to revise the steel sprocket with the goal of achieving the best of both worlds – the extreme durability of ProX’s steel construction with the advantages of less weight. 

lightweight rear sprocket

An all-new, lightweight design gives ProX Ultralight steel rear sprockets up to a 35% weight savings over other standard steel sprockets. The high-strength, steel construction provides superior longevity even in extreme riding conditions, ultimately translating to 2 to 3 times the usable life compared to average aluminum sprockets.

ProX Ultralight Rear Sprocket
Specially designed and precision-machined, ProX Ultralight sprockets can drop a third of the weight over some standard steel sprockets.

ProX Ultralight sprockets are CNC-machined to exact specifications to achieve the precise, lightweight design and exact fitment. Additionally, a diamond cut manufacturing method holds sprocket teeth to diameter and alignment tolerances, ensuring even and smooth operation. 

ultralight sprocket close up ps

Reliable, flush sprocket-to-hub mounting is achieved with countersunk, tapered mounting holes, pairing perfectly with a set of ProX sprocket bolts and lock nuts. These sprockets are also treated with a full coverage coating for added corrosion and wear resistance, plus a factory look.

prox sprocket and chain ktm husqvarna

ProX Ultralight steel sprockets are offered for a wide range of dirt bike applications in all popular sizes.

Purchase from your favorite e-tailer or dealer, or contact us to order directly in the US!

Contact Us to Order Directly in the US

Find your Ultralight sprocket part number below.

MakeModelsYearsPart No.Size
BetaRR 125 – 4982013 – 202207.RS73013R-48
07.RS73013R-49
07.RS73013R-50
07.RS73013R-51
48T
49T
50T
51T
HondaCR125R, CR250R,CRF250R, CRF450R1987 – 202207.RS12087R-4807.RS12087R-4907.RS12087R-5007.RS12087R-5107.RS12087R-5248T
49T
50T
51T52T
HusqvarnaCR/W 125 – 3601990 – 201307.RS62097R-4607.RS62097R-4707.RS62097R-4807.RS62097R-4907.RS62097R-5007.RS62097R-5107.RS62097R-5246T47T48T
49T
50T
51T52T
HusqvarnaTC852014 – 202207.RS61003R-4607.RS61003R-4707.RS61003R-4807.RS61003R-4907.RS61003R-5007.RS61003R-5146T47T48T
49T
50T
51T
HusqvarnaTC/FC/FE 125 – 5012014 – 202207.RS62090R-4807.RS62090R-4907.RS62090R-5007.RS62090R-5107.RS62090R-5248T
49T
50T
51T52T
KawasakiKX 125/250/250F/450F1987 – 202107.RS42080R-4707.RS42080R-4807.RS42080R-4907.RS42080R-5007.RS42080R-5107.RS42080R-5247T48T
49T
50T
51T52T
KTM85/105 SX2003 – 202207.RS61003R-4607.RS61003R-4707.RS61003R-4807.RS61003R-4907.RS61003R-5007.RS61003R-5146T47T48T
49T
50T
51T
KTM125 – 530 SX/XC/EXC,
SX-F, XC-F, EXC-F
1990 – 202207.RS62090R-4807.RS62090R-4907.RS62090R-5007.RS62090R-5107.RS62090R-5248T
49T
50T
51T52T
SuzukiRM-Z 250RM-Z 4502007 – 20222005 – 202207.RS32080R-4807.RS32080R-4907.RS32080R-5007.RS32080R-5107.RS32080R-5248T
49T
50T
51T52T
YamahaYZ 125/250WR2501980 – 1998
1990 – 1998
07.RS22080R-4807.RS22080R-4907.RS22080R-5007.RS22080R-5107.RS22080R-5248T
49T
50T
51T52T
YamahaYZ/WR 250/400/426/450F1998 – 202207.RS22099R-4707.RS22099R-4807.RS22099R-4907.RS22099R-5007.RS22099R-5107.RS22099R-5247T48T
49T
50T
51T52T

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