The stock front position has the tops of the tubes, not including the top nuts, level with the top of the triple clamp. The stock rear link is 140mm between hole centers. Every 1mm greater than 140mm lowers the seat height about 2.8mm. Most people have found lowering the front or raising the rear 10-15mm compared to stock improves high speed aerodynamics.
A friend at work races bikes and had some interesting comments:
- if you lower the front, the bike turns in quicker because you have decreased the trail.
- if you raise the rear, you have effectively decreased the rake angle which also makes the bike turn in quicker but has a multiplied effect on the steering response, i.e. 12mm raise at rear is equal to about 36mm lower at front (or summat).
Have you found this to be correct or is it more a 1:1 as you indicated?
Since I haven't been able to get in touch with him recently and I'm looking at raising the rear of the Wee to get a little more gc. Does anyone know what a reasonable amout of raise is? I've noticed anything from 5/8" (134mm) to 1 1/8" (130mm) for the dogs. I'm not really concerned about seat hight because I can flat foot now but am wondering what effect have those who have the raisers noticed on their handling?
Is the 1 1/8" raise make the bike twitchy for long slab or is the handling just quicker?
What is the actual gain in gc for the various length dogs? Is it a straight equal to seat hight increase?
How bad is the effect on the chain slider?