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1978 R100S rear tire size

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germancarguy
Posts: 113
Joined: Mon May 09, 2022 9:28 am
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Re: 1978 R100S rear tire size

Post by germancarguy »

The swingarm and final drive are a fixed assembly and the swingarm adjustment just changes the relationship to the frame. No net change to the tire clearance.

Paul
1962 R69s (sold)
2019 R1250GS
1974 R60/6 project
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Werner1111
Posts: 109
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Location: Hollyweird, CA
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Re: 1978 R100S rear tire size

Post by Werner1111 »

germancarguy wrote: ↑
Fri Jan 17, 2025 9:03 am
 The swingarm and final drive are a fixed assembly and the swingarm adjustment just changes the relationship to the frame. No net change to the tire clearance.
Oh, of course. The issue is the tire rubbing on the swingarm, not the frame. Thanks for pointing that out.
R69 R90/6 R100/7 R100S R1150GSA S2R1000
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germancarguy
Posts: 113
Joined: Mon May 09, 2022 9:28 am
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Re: 1978 R100S rear tire size

Post by germancarguy »

I installed the BMW spacer 36 31 2 301 737 and the 120/90 X 18 has adequate clearance.

Thanks all for the help

Paul
1962 R69s (sold)
2019 R1250GS
1974 R60/6 project
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EthanS
Posts: 3
Joined: Tue Jan 28, 2025 2:51 pm

Re: 1978 R100S rear tire size

Post by EthanS »

germancarguy!
Thank you for the deal on my new rear tire! I will do my best to keep it underneath me!
Cheers,
Ethan
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