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Author Topic: Spoked wheels  (Read 1380 times)

MR.E

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Spoked wheels
« on: September 12, 2011, 03:47:52 PM »
Evening All!

Can anyone tell me what, if any benefits, i'll get from putting a 19" rim on the front wheel.
I've been given some spoked wheels for the BMW, they need new rims (for aesthetic reasons) but am thinking about a 19" rim on the front.

What will it do to the bike??

Thanks
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Offline Barry

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Re: Spoked wheels
« Reply #1 on: September 12, 2011, 04:35:19 PM »
Quote
What will it do to the bike??
 

It will raise the front of the bike, lengthen the wheel base and change the handling. Don't know if it will be a significant effect but you would expect it will slow the steering.

Perhaps an overlooked effect is that the brakes will be slightly less effective with the larger wheel.
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Barry Cheshire, England 79 R45

Offline montmil

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Re: Spoked wheels
« Reply #2 on: September 12, 2011, 06:15:17 PM »
Tire clearance issues may require removing the heavy steel fork brace fitted under the front fender.

Monte
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Monte Miller
Denton, TEXAS
1978 BMW R100S
1981 BMW R65
1983 BMW R65
1995 Triumph Trophy
1986 VW Cabriolet

Offline nhmaf

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Re: Spoked wheels
« Reply #3 on: September 12, 2011, 06:55:10 PM »
+1 with the above, and you won't want to remove the brace as the handling will be awful - you may well have to modify it /drill holes to allow more clearance however.

You could slightly lower the tubes in the yokes to mitigate the change of rake/trail/wheelbase
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Airhead #12178 ? BMWMOA #123173 ?BMWRA #33525 ?GSBMWR #563 ?1982 BMW R65LS ?1978 BMW R100/7 1998 Kawasaki Concours

Offline steve hawkins

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Re: Spoked wheels
« Reply #4 on: September 13, 2011, 03:19:17 AM »
I am running a 19 inch spoke wheel on my R65 cafe racer.

You will have to raise the fork legs through the yoke/triple tree by half an inch to undo the handling effects mentioned above, of the bigger wheel.

Your current fender is meant for the smaller 18 inch wheel.  I have no idea if it will still be any good.

I am also running a non standard for brace/fender combination.  
But then, my bike is non-standard.
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Steve Hawkins R100 (that wants to be an R65)

tvrla

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Re: Spoked wheels
« Reply #5 on: September 15, 2011, 09:11:52 PM »
Nice bike, Steve!

Back on topic - I recall seeing an R65 fitted with an R80ST front wheel (19") and nothing needed to be done. He hadn't changed the forks or the fender mount or fender. He said it handled fine, and rode it all over. I have noticed there is quite a bit of room under that fender/mount, and don't see why the larger wheel wouldn't fit.

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MR.E

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Re: Spoked wheels
« Reply #6 on: September 20, 2011, 01:58:47 PM »
Now then

Cheers for he replies............not been on for a few weeks.

Gonna stick to an 18" rim, for now but thanks for all the info.
Bike is not running standard mudguards any more & back end hoop has been chopped to accommodate single seat etc
I will add photos at some point...........when i dare, i'm not too happy with it's look just yet!!

Elliott
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