Landracing Forum

Bonneville Motorcycle Speed Trials => Bville Motorcycle Speed Trials Rules Questions => Topic started by: charlie101 on May 19, 2012, 04:07:37 AM

Title: Motorcycle tire/fender clearance
Post by: charlie101 on May 19, 2012, 04:07:37 AM

I am asking on the behalf of a friend. He's got a homemade front fender, now he can't get the same 17" street tire profile and the new tires are the same width but slightly taller. He's going against a 120 mph record and I am worried it's too little play to the tire crown. Is there a rule or what's the smallest tire/fender play allowed to get thru BUB scrutiny?

Title: Re: Motorcycle tire/fender clearance
Post by: 55chevr on May 19, 2012, 07:49:57 AM

There are no restrictions on minimum fender clearance.  There could be  a question on safety if the fender has no clearance.

Title: Re: Motorcycle tire/fender clearance
Post by: charlie101 on May 19, 2012, 09:35:37 AM

Quote from: 55chevr on May 19, 2012, 07:49:57 AM

There are no restrictions on minimum fender clearance.  There could be  a question on safety if the fender has no clearance.

Based on your avatar, i recon you have a similar fender. What clearence do you run? What tire growth do you calculate with?

Title: Re: Motorcycle tire/fender clearance
Post by: 55chevr on May 19, 2012, 11:14:05 AM

3/4 of inch clearance ...

Joe

Title: Re: Motorcycle tire/fender clearance
Post by: charlie101 on May 19, 2012, 11:24:35 AM

OK, thanks!

Title: Re: Motorcycle tire/fender clearance
Post by: Old Scrambler on May 19, 2012, 12:13:01 PM

My front fender has 1/2-inch clearance static and from the pictures appears to compress at the front but no rub marks were observed.