Landracing Forum

Misc Forums => LSR General Chat => Topic started by: Truckedup on August 15, 2015, 07:20:32 AM

Title: Tires...
Post by: Truckedup on August 15, 2015, 07:20:32 AM

 I'm building a open class naked frame dual Triumph bike.We race on pavement at Ohio and Loring.If it goes well the speeds will be in excess of 160 MPH. Getting Z or W rated tires of narrow widths like 120mm  is very limited in 18 and 19 inch sizes and they are all listed as "front" tires by the manufacturers. The listed rear tires are all very wide sport bike widths..I know I'm not the only guy in this situation...
  So are racers using tires listed for the front on the rear? Or what?   Thanks

Title: Re: Tires...
Post by: saltwheels262 on August 15, 2015, 08:40:51 AM

I spent a lot of time in 2006 researching narrow 17 inch wheels that would fit my mc .
Would have been easy to spend big bucks on custom billet 17's.
Ended up going with oem from Carolina cycle warehouse.
They were for a custom drag chassis that had 18's .

Don't know about running fronts on the rear.

Saltwheels

Title: Re: Tires...
Post by: Seldom Seen Slim on August 15, 2015, 10:19:09 AM

I'm not the tire expert by any means, but I think I remember reading that drive tires are constructed for driving and fronts for steering - and arae even marked as such.  I do know that some tires will work either way, but those will have markings indicating which rotation is which for steer or drive use.  Look into it before trying a steer tire on the rear.

Title: Re: Tires...
Post by: Speed Limit 1000 on August 15, 2015, 10:33:40 AM

Avon AM26 Roadrider 90/90-18 Front/Rear Tire

You need to contact a knowledgeable tire dealer. Old Nortons used the same tire front and rear.

Title: Re: Tires...
Post by: fredvance on August 15, 2015, 11:27:45 AM

In my limited knowledge the rear is for drive and the front for braking. If you put a front on the back have the arrow point in the opposite direction of rotation.

Title: Re: Tires...
Post by: Truckedup on August 15, 2015, 12:26:20 PM

Quote from: Speed Limit 1000 on August 15, 2015, 10:33:40 AM

Avon AM26 Roadrider 90/90-18 Front/Rear Tire

You need to contact a knowledgeable tire dealer. Old Nortons used the same tire front and rear.

  Not hard too find but appear to be V rated for 149 MPH....I need a Z or W rated tire.

Title: Re: Tires...
Post by: Jessechop on August 15, 2015, 03:06:32 PM

You can run fronts on the rear. The issue comes in with siping for water displacement.

Title: Re: Tires...
Post by: Truckedup on August 16, 2015, 06:35:36 AM

Quote from: Jessechop on August 15, 2015, 03:06:32 PM

You can run fronts on the rear. The issue comes in with siping for water displacement.

 We've not racing in the rain so..... :-D   This makes tire choice a lot easier...