Castor Correction Kit
All prices are exclusive of VAT.
Lighten the steering of your MGB and reduce mid-corner weighting with our castor correction wedges – the original and still the best. We believe they offer the greatest single improvement on the market for such a small price. Can you really justify power steering for your MGB!
“The car went some 900 kms over the last weekend on an MG tour over all kinds of roads. To be able to turn into corners with just two fingers on the wheel instead of a tight grip of both hands and have almost no understeer was a sheer delight. What more can I say but you have done a good job developing this technology and many thanks for it” John
Worldwide shipping availableDownload Fitting Instructions
MGBs were produced with a castor angle of 6.5 degrees to allow for tyre slip of 10 to 11 degrees. Modern tyres have a slip angle of 2 to 3 degrees, causing the MGB steering to load up and become increasingly heavy the harder you corner. Castor angle is employed primarily to self-centre the steering at speed. As modern tyres are far more directional, less self-centring force is required and therefore less castor. Frontline’s innovative castor wedges fit between the chassis and the front crossmember to rotate it forwards by around 3 degrees, thereby reducing the castor angle. The result gives noticeably lighter steering that doesn’t load up when cornering, increases positive feedback through the steering and improves directional control.
This is a very easy DIY fit requiring only that you loosen 4 bolts, fit the wedges and add some bushing to the rack. It should take you 1.5 hours to install and you may want to have your tracking re-checked afterwards.
Download fitting instructions
Always use appropriate equipment for the job at hand. If in doubt, seek professional advice.
Castor is that part of a car’s suspension geometry the primary function of which is to ensure the car travels in a straight line at speed. It is the term given to the slight backward tilt of the upper end of the kingpin of a car to produce directional stability at the front wheels and a degree of self-centering. When the MGB was designed, the tyres available had a much greater slip angle than modern tyres. Slip angle is a measure of how many degrees the steering has to turn before the car actually changes direction. Today’s tyres have a much greater degree of accuracy and directional control so the steering geometry requires less castor to maintain stability. Most MGBs have heavy steering. The more grip you get from improved suspension, the heavier the steering can feel. This is all the result of too much trailing castor. Fitting the castor correction kit reduces the trailing castor to the degree required by modern tyres for lighter, more responsive steering.