Running the same size tire front and rear

Running the same size tire front and rear

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been around the block

  • #1

how terrible is it to run the same size front and rear tire?

reason i ask is that i may run a rear rim on my front hub to accomodate for 17in tires…

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i would have identical rims(well no the hubs of course) and since i already have quite a few good +61404532026 tires in my garage i’d run two of those….

right now with my 18inch wheels i run a 120 in the back and a 110 up front and all seems well….

insight apreciated..

this is on a gs400 btw…

thanks guys!

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  • #2

totally common. typically it’s always a good idea to stick to stock wheel size/geometry etc. to maintain what the engineers originally designed for optimal handling, but i’d think you’ll be fine with 17’s front and rear.

i run 18’s on my xs650, and the 2011 suzuki tu250x i just bought my wife runs 18’s as well. lots of bikes with the same size wheels on both ends.

i think the smaller rear rim sizes found on some of the japanese bikes might have been to allow a wider/taller rear tire and still remain the same diameter as the front. but that’s just a late night guess on my part – never thought about it before.

i run a 110 rear and 100 front on my xs650. the tu has a 90 front and 110 rear. a 110 front is just heavier and would make handling worse frankly – you’d be better off with narrower rubber on both ends.


been around the block

  • #3

thanks for you insight.

when you install a 17in rim on a wheel that had an 18 rim, do you have to buy customs spokes to accomodated for the slightly shorter distance between the hub and the rim (1/2 inch shorter my guess) of is there enought threads/play to use the stock spokes?

  • #4

you’ll need new spokes – buchanan is a good source for customs. you doing a super-moto or something?


been around the block

  • #5

not a supermoto build. i dont know if i can call it a cafe racer either because i am keeping the stock bar and bikini fairing on this gs400s.

this is *my* bike (well an identical one)

Read more: Motorcycle Tire Guide 101 and FAQ

picture this bike with supermoto rims on gs hubs, upgraded front caliper and rotor, cafe tail hump.

running the same size tire front and rear

  • #6

not a complete thread jack, but related question.

tires are often sold as “front” or “rear” is there anything to prevent one from running them in the non-advertised position other than tread pattern?

  • #7

on our little honda’s, if tyres are hard to come by size-wise, we run the same front tyre on the rear but mount it backwards..

big r

heaven is so far away.

  • #8

evorussel, read my response here:

Category: Motocycle Tires