150 tire on a stock 82 gs1100e rim?

[xDUKEx]

anyone done this before, will it fit, will the tire perform ok.

[Travellin' Jones]

It may fit, but I don't think it's a good idea. The rim isn't sized for a tire that wide.

[oldschoolGS]

You need a 3.5in rear rim minimum, 4in prefered. A 140 works best with the 3.5in rim.

'85 and '86 GS1150's had the 3.5in rear.

Good Luck, Ed.
1983 GS750ED
2005 GSF1200SZ

[Hap Call]

Don't do it for two reasons:

1. The narrow 2.5 inch rim "pinches" the tire, making the contact patch smaller and because the contact patch is smaller the tire will wear a lot faster...you will be changing it out in with only half the mileage you would have gotten out of a 130 tire.

2. Also because of the pinched tire, the transition from vertical to a lean will be more abrupt...not good for handling.

The best way would be to mount a wider rim. A lot more goes into this such as offset front sprocket, possible swingarm change, etc. There have been some guys that were able to mount the 1150 rim with no mods if I'm not mistaken.

Hap

[KEITH KRAUSE]

I run a 130 on my '79 1000, which has the same width wheel I believe.
I suggest you don't go wider than 130.

[rphillips]

Around here, one size wider than stock for the original wheel on the bike is normal. I don't know anyone that goes 2 sizes. A wider wheel & a 150 tire will probably call for brake torque arm mods at the least.

[Anonymous]

I run a 130 on my 82 GS1100...have been told by more than one mechanic to go no wider than that. Mount an 1150 swing arm, or score some early gsxr suspension pieces--pre 92, I believe--I have stuff from an 88 GSXR1100. Front suspension parts are bolt on if you swap out EVERYTHING, but the swing arm requires some small amount of modification.

[rphillips]

I just got back from a 140 mi trip, on my "86" GS 1150, with a 3.5" rear wheel, and a 150/80/17 Continental radial. After parking it in the garage, I noticed in the very center of the tire, cords were showing. The wear indicators are slightly offset to the sides, and they are still very visible, with apprx 2/16' of rubber still there. Just an indicator that the 3.5 wheel has pinched the tire enough that the bike is running mostly on a patch between the wear indicators. I had got this tire because I liked it, and the 150 was the smallest size it came in. I'll not be trying this again

[gsBert]

haha , i have a 170 on the back of my 81 gs 1100.
but before telling you guys it was ok to mount a big tire on there, i have to say i have a 4.5" gsxr rim. my swingarm is gs 1100 and i'm told the front sprocket had to be offset by 16mm for the chain to align. but since my engine's an 1150 i dont know if that makes a difference.

wider tires don't necessarily provide better cornering or a bigger contact patch, so dont put that 150 on.

i have a 130 on the rear of my 82 1100 which has a stock 1150 rear wheel. no handling complaints (not from the rear anyways)