Fulcrum wheel/tyres

shanye

I Having being using a set of Fulcrum wheels and a pair of Michelin Krylion Carbon road tyres on my road bike for the last two years, but with Michelin not make the krylion no more I went a bought a set of continental grand prix 4000s these had great reports from everyone.
Since I started using this tyres I have more wobbles in last month than I have since I started cycling, brought the bike to my local bike shop thought it was a bearing problem, he checked the bike and wheel thoroughly but could find noting wrong with the either,
out again last night with the lads for a spin and on a new stretch of road it started this again the same feeling if you had a puncture, has anyone had this experience and how did you rectify it.

smacl

Maybe you changed from 25mm to 23mm in the process which will typically be inflated to a higher pressure and have slightly less rubber on the road.

TinyExplosions

Not the most helpful, but I ran Fulcrum Racing 3's and Conti GP4000s for ages and had no problems

smacl

On Fulcrum 7s myself, abeit with 25mm Durano plus. No problems at all.

shanye

smacl wrote: »

Maybe you changed from 25mm to 23mm in the process which will typically be inflated to a higher pressure and have slightly less rubber on the road.

Would you think it the pressure that could be causing the problem the old tyres ran on about 100lbs of pressure and the new ones are running on 120lbs I have reduced them by 10lbs but no big difference.

smacl

shanye wrote: »

Would you think it the pressure that could be causing the problem the old tyres ran on about 100lbs of pressure and the new ones are running on 120lbs I have reduced them by 10lbs but no big difference.

120psi is a good bit harder than 100psi, and you feel it as road noise being transmitted more to the seat and handlebars. Don't know how much the extra 2mm makes to handling, but I certainly find 25mm at 100psi more comfortable than 23mm at 120psi on poor roads. Check below for a rough guide to appropriate pressure;