View Single Post
Old 05-03-2021, 03:33 PM   #11
Stinger101
Registered User
 
Stinger101's Avatar
 
Join Date: Jan 2015
Location: Alcester
Bike: M1200s
Posts: 241
Quote:
Originally Posted by Darkness View Post
In theory, (120*0.70)-(120*0.60) = 12mm increase in ride height, and the same reduction in clearance to the front mudguard. In practise, the change may be less, though I’d be surprised if it were as little as 5 or 6mm.

What rim width do you have on the rear of the bike? The 900 Monster has the 5.5” rear rim which was originally fitted with the scarce 170/60 size tyres. You can fit the 180/55 on those, but for 190 or 200 width tyres you really need a 6” rim.

If you’ve got the 4.5” rim you are probably already at the maximum rubber at 160.

ETRTO manufacturer parameters allow + or - 3.5% and it's very difficult to allow a fixed value into your calculation. In practice the ride height is an average 5 to 6mm.
I'm really boring on tyres as they've been my job for 34 years...
Stinger101 is offline   Reply With Quote