Introduced to the market in 2009, and fitted to hundreds of Caterhams since then, this is a updated and improved version of the original joints made back then.
WHAT DO THEY DO?
Apart from looking dead sexy and matching our top wishbone joints, the JWM Adjustable Bump Steer Track Rod Ends allow fine adjustment of bump steer independently for each side of the car. Bump steer is the sensation of lack of straight line stability when driving briskly on bumpy roads especially the country lanes a Caterham is designed for. If you feel a saloon car would be more stable, you have bump steer.
Believe it or not, independent measurements of new Caterhams supplied for racing have revealed some pretty shocking natural bump steer characteristics, often exceeding 1 degree of total toe deviation side to side.
Less important on a smooth race track, this becomes critical for any car driven as Caterham intend on the road. JWM Adjustable Bump Steer Track Rod Ends enable perfect front geo, not possible without them.
HOW DO THEY WORK?
The issue of rack position stems from the number of differing steering arms and track rod suppliers/manufacturers Caterham have used over the years, and the inconsistency of the tapers, as well as the inconsistencey of chassis production and minute geometry deviations between the sides of the car.
Shimming your stering rack to the perfect position is impossible as the rack mounts are not directly underneath the track rod bearings, hence an adjustment on one side of the car effects the other side, making it near imposible to get a perfect setup.
Because JWM Adjustable Bump Steer Track Rod Ends aloow independent shimming at the hub end of the rack, each side of the car can be set independently. This allows proper compensation for the manufacturing inaccuracies of your car.
In order to fit, this kit does require the steering arm taper to be drilled out to 13mm but new steering arms can also be easily obtained from us for far less than the noirmal Caterham price.
The rose joint uses a Teflon®/Kevlar® material as a liner to keep dirt and debris out. The Kevlar additionally serves to lubricate the precision ground, heat treated, hard chrome plated 52100 bearing steel ball. No ugly boots are required so long as they are maintained in accordance with the instructions. Other components are plated EN8 high grade engineering steel.
The Teflon®/Kevlar® material injection moulded race won’t loosen with use like traditional PTFE (Teflon®) liners, increasing the usable life of these joints (most sold in 2009-2012 are still in use today after tens of thousands of miles without issue, and if properly looked after will continue to look great for many years.
I've been around Caterhams as long as I can remember. With my father we've been on a journey to build cars that exceed the specification of any factory produced Caterham. This interest has become my career and having completed my time at Oxford Brookes University having achieved two degrees: Motorsport Engineering (1:1 GPA 4.0), Motorsport Technology (1:1 GPA 4.0 Hons). I am now sharing my time between running JWM and working as a professional race engineer in high level motorsport. My talents were also recognised by the University where I led their Formula Student team in the area of Vehicle Dynamics.
Got suspension questions? Advice is free!
My area of specialisation is suspension analysis, research and design, where I have worked with one of the most successful Caterham race teams, DPR Motorsport, as well as designing and refining my own products. I've recently built my own Caterham Sigma car which is equipped with full data logging in order to model the best settings for your car and be able to blueprint suspension settings on race cars. I am opening a workshop near Cadwell Park and Blyton Park in the autumn where I will offer these setups and services in a fully equipped workshop.
For products in my shop, I endeavour to keep all items in stock and offer next day delivery on my items in partnership with DPD.
As JWM is a small company, and at this time we do not charge VAT.
Please note if you are outside the UK and EU you can still buy some products from me, but the diversity in size and weight of some parts means I ask that you email me so I can calculate the best insured shipping rates.