Tires for '89 R100RS

[superstamper1]

What is the largest / best size tires to put on a monoshock RS?

 

[20774]

Welcome to the forum! Could you be a little more specific as to the year of bike? Personally I'd go with the stock sizes...fatter tires don't really help with handling in the grand scheme of things...if fact, they can make turning in a bit more heavy.

 

[6322]

I'd stick with the manufacturer's recommendation. They made it for a reason. Clearance, handling and load are all pretty well evaluated before the bike is released for public consumption. What does your owner's manual say? Good luck with your new shoes!

 

[superstamper1]

My bike is a 1989 R100RS. I don't have a manual for it and the rear that's on it just looks so skinny. Anybody have the specs for factory recommended size?

 

[20774]

Thanks for the update...I'll add that to the title.

Check out this page...it shows basic specs for the bike.

http://www.bmbikes.co.uk/specpages/R100RSmono.htm

 

[akbeemer]

Tire – Front: 90/90-17
Tire – Rear: 120/90-18

EDIT: My source (https://www.totalmotorcycle.com/motorcyclespecshandbook/bmw/1989-BMW-R100RS) is different than Kurt's. I'll defer to Kurt's superior knowledge of airheads.

 

[jchussey]

Michelin Pilot Activ

What is the largest / best size tires to put on a monoshock RS?

Michelin Pilot Activ are excellent airhead tires. Stick with the OEM sizes and get over the rear tire looking too skinny. Fitting larger tires on these bikes has a noticeably negative effect on the handling. Both wheels on the monos are 18 inches in diameter.

Front - 90/90-18
Rear - 120/90-18

And don't run them with gobs of pressure like so many people do. 30psi front, 32psi rear for one-up with no luggage is a good starting point.

Jim

 

[RPGR90s]

tires

Michelin Pilot Activ are excellent airhead tires. Stick with the OEM sizes and get over the rear tire looking too skinny. Fitting larger tires on these bikes has a noticeably negative effect on the handling. Both wheels on the monos are 18 inches in diameter.

Front - 90/90-18
Rear - 120/90-18

And don't run them with gobs of pressure like so many people do. 30psi front, 32psi rear for one-up with no luggage is a good starting point.

Jim

Couldn't agree more. Stay with the oem sizes. I once put larger sizes on my /5 and couldn't believe how heavy the bike felt.

"Old Guys on Old Bikes with Skinny Ass Tires"!

 

[kbasa]

I’m quite enjoying Conti ClassicAttack Radials on my 84 R100RS.

They’re a big step up from bias ply in terms of comfort and feedback. They’ll go on my /2 when it’s time.