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Old 05-05-2011, 02:06 PM   #1
noz OP
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police spoked front wheel

Am I right in saying that only the brembo twin disc setup will fit on a police spoked wheel. And how do you identify one of these spoked wheels?
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Old 05-05-2011, 02:11 PM   #2
Rob Farmer
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The Brembo front end needs the narrow front hub (two ribs) so that the spokes clear the brembo calipers. If nobody else replies in the next few minutes I'll take my camera to the garage.

There you go


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Old 05-05-2011, 03:02 PM   #3
Boxer Metal
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It's the same hub as a R80G/S. I am actually getting ready to build on of these wheels.
The hubs are pressed together in the middle. If you take a /6 or 7/(17mm axle) front hub with 4 ribs and pull it apart with a screwdriver you then machine the hub half so you have one and a half ribs per side. Take that total measurement of what you have removed from both sides and remove that from the center wheel bearing spacer. You will need to machine or by R80G/S left and right axle spacer and the caliper spacers and use the deeper brake discs from a R65(1979-1984) or an R80G/S

Wheels Spacers $25.00 each from BMW
34111241609
36311242149

Caliper Spacers x4 $6.00 each from BMW
34321242308

You will see in Rob Farmers pictures his hub has only 2 ribs. The spacers & parts are not longer available to make this set up work and in the US we never had this other than a few special order 1981 only R100CS's.
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Old 05-05-2011, 06:48 PM   #4
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Quote:
Originally Posted by bmweuro View Post
It's the same hub as a R80G/S. I am actually getting ready to build on of these wheels.
The hubs are pressed together in the middle. If you take a /6 or 7/(17mm axle) front hub with 4 ribs and pull it apart with a screwdriver you then machine the hub half so you have one and a half ribs per side. Take that total measurement of what you have removed from both sides and remove that from the center wheel bearing spacer. You will need to machine or by R80G/S left and right axle spacer and the caliper spacers and use the deeper brake discs from a R65(1979-1984) or an R80G/S

Wheels Spacers $25.00 each from BMW
34111241609
36311242149

Caliper Spacers x4 $6.00 each from BMW
34321242308

You will see in Rob Farmers pictures his hub has only 2 ribs. The spacers & parts are not longer available to make this set up work and in the US we never had this other than a few special order 1981 only R100CS's.

Same hub as the R80ST , so also the entire R80ST wheel (which is 19") will work.
I've got some /7 hubs at home, time to get to turning in the lathe when I return.
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Old 05-05-2011, 07:16 PM   #5
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Originally Posted by wirewrkr View Post
Same hub as the R80ST , so also the entire R80ST wheel (which is 19") will work.
I've got some /7 hubs at home, time to get to turning in the lathe when I return.
...and real early R65's to.... A new hub from BMW is only $245.00.
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Old 05-05-2011, 07:25 PM   #6
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Originally Posted by bmweuro View Post
...and real early R65's to.... A new hub from BMW is only $245.00.

Only !

Oh, such a deal.
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Old 05-06-2011, 01:22 AM   #7
noz OP
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Rite best go have a look at the bike. Its a R75/7 with a few of the police extras like tank, twin ate disc, coil box but i dont think it has the 2 rib hub. But only seeing will sort that.

So set up like that would need
deeper discs
spacers
2 rib hub front wheel

just to clear up what these wheels are on tho, some are saying the g/s and st and i thought they were 3 rib or is that just down to the years
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Old 05-06-2011, 01:32 AM   #8
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Are you planning on fitting a Brembo front end in the bike Noz?

Fitting a handlebar master cylinder conversion to your ATE setup will improve the braking dramatically. I do this as a matter of course on any heavy flywheel bikes I own.

My 100/7 was converted from ATE to Brembo forks and the only benefit was not having to setup the ate calipers. There's no appreciable difference between the two braking performance wise.

Are you in the US or Europe?
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Old 05-06-2011, 05:07 AM   #9
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You're right NOZ - the ST and G/S use three rib hubs, where the 81-4 line-up with the dual brembos like the 100CS used a two rib hub as pictured with the deeper dished R65 discs. Just about everything including the calipers needed special shimming.
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Old 05-06-2011, 05:42 AM   #10
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Was thinking about the brembo front end swap. But if it really gives no real improvement i think i may leave it. Sounds like a lot of messing around with shimming etc.
What size master do you go for?
I'm in the uk
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Old 05-06-2011, 06:53 AM   #11
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You guys must be telepathic, the orig. poster never mentioned it was for a BMW.
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Old 05-06-2011, 09:29 AM   #12
Rob Farmer
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Quote:
Originally Posted by Speedo66 View Post
You guys must be telepathic, the orig. poster never mentioned it was for a BMW.
Police wheels and brembo in the same sentence. It's like Pavlov's dogs we're trained to respond to key words and sounds

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Old 05-06-2011, 09:47 AM   #13
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Quote:
Originally Posted by Rob Farmer View Post
Are you planning on fitting a Brembo front end in the bike Noz?

Fitting a handlebar master cylinder conversion to your ATE setup will improve the braking dramatically. I do this as a matter of course on any heavy flywheel bikes I own.

My 100/7 was converted from ATE to Brembo forks and the only benefit was not having to setup the ate calipers. There's no appreciable difference between the two braking performance wise.

Are you in the US or Europe?
Thats interesting...!

I rebuilt my ATE front end and calipers and installed a handle bar master cyl and came to the same conclusion. The ATE's stop my bike as well as the Brembos do and actually have similar or better better feel.

Now I feel better!
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Old 05-06-2011, 11:18 AM   #14
noz OP
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You know it didnt even cross my mind about make and model, but now u said it i am glad some are telepathic
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Old 03-22-2015, 07:19 AM   #15
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Quote:
Originally Posted by Boxer Metal View Post
It's the same hub as a R80G/S. I am actually getting ready to build on of these wheels.
The hubs are pressed together in the middle. If you take a /6 or 7/(17mm axle) front hub with 4 ribs and pull it apart with a screwdriver you then machine the hub half so you have one and a half ribs per side. Take that total measurement of what you have removed from both sides and remove that from the center wheel bearing spacer. You will need to machine or by R80G/S left and right axle spacer and the caliper spacers and use the deeper brake discs from a R65(1979-1984) or an R80G/S

Wheels Spacers $25.00 each from BMW
34111241609
36311242149

Caliper Spacers x4 $6.00 each from BMW
34321242308

You will see in Rob Farmers pictures his hub has only 2 ribs. The spacers & parts are not longer available to make this set up work and in the US we never had this other than a few special order 1981 only R100CS's.
I know this is an ancient thread but just found it - works a treat! I had no idea you could even seperate a hub but just got one out of the shed and hey presto pulled apart. I'll turn it down tomorrow!
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