Advice on tyre size needed..

[BOBAD]

Hi all....

I'm thinking of fitting the wheels off an R 1150/R to my 2001 1150GS.

They have brand new Metzeler M1s fitted, and the rear is sized 170 - 60, whereas my 1150GS is 150 - 60.

The question is: will the slightly wider 170s fit or not ?

Thanks to anyone taking the trouble to answer...

 

[Paul Young]

Yes it will...

5" wheel width = 170 tyre width
5.5" wheel = 180 or 190 tyre

All options above will fit the rear of the GS but be prepared for the fact that you will effectively be gearing it down by around 3% as the rolling circumference of the sports tyres is slightly smaller than the std GS ones.

You might want to look into getting a 3-spoke front wheel from an R1100R/RS/RT as they're usually slightly cheaper & the brake discs on these are full floaters... Try the "search" button & you'll find loads of useful stuff

 

[BOBAD]

Yes it will...

Thanks for that reply Paul..........very helpful.

Another question though...........how will fitting a smaller wheel to the front affect the speedo reading?
I've got a Touratech IMO computer on board but losing 2" in wheel size will screw up the read-out.
What adjustments need to be made to correct this?

 

[Paul Young]

You'll need to check the instructions for your IMO as they should tell you how to set the computer for the wheel/tyre size you're using.

With the Std speedo, you just change the speedo drive gear for the correct one...