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1Back to top Go down   Five spoke K12 wheels on a K11/K100/K75 Empty Five spoke K12 wheels on a K11/K100/K75 on Wed Jan 14, 2015 2:20 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
At last, I've found it! This works for all K1200RS, K1200GT-Brick or K1200LT front wheels.

If a K1200 series, five spoke, 3.5x17" wheel is what you'd like to swap onto your K bike's three-spoke or Y-spoke front end so you can use a 120/70ZR17 tyre and four-piston Brembo brakes, the bearings you'll need are 25x47x14 RH side, and 25x47x20.6 LH side, due to axle diametre and length. You can't get these from a BMW dealership. You use your original 25mm diametre axle.

The industry number for a 25x47x14 sealed ball bearing is 62005-RS

The industry number for a 25x47x20.6 can be made by combining two sealed bearings in the single bearing's bore. They are 25x47x8 sealed bearing which is a 16005-2RS, and a 25x47x12 sealed bearing which is a 6005-2RS.

There is no 25x47x20.6 bearing that I can locate from any manufacturer, even from those Chinese bearing companies on eBay, etc., that claim to have everything.

The .6mm difference is nearly made up by the two bearings being placed side by side in the wheel (spreads the load nicely), and/or one can have their favourite machinist fab a slightly wider (.5mm+/-) replica of the collar to accommodate this miniscule difference. I have seen it work and it is easily done. A mate has just completed this on his R80 using '95 K1100LT forks, axle and both collars over a K12 front wheel. The preload is correct and the wheel spins freely with no discernible or excess free play. The wheel/brakes are centred in the forks.

A 25mm between-the-bearings centre spacer is required, part number
36 31 1 458 419, from BMW for about $12.00. You can use your original axle collars on the later wheel, and they get modded slightly.

No stainless steel axle fabrication is required.

The R1150R/RS/RT series front wheels require different dimension bearings. Further research is required for those wheels.

I am using an earlier 5x17" rear K1200RS wheel on a Paralever final drive and there is no real clearance or offset issue to speak of with a 170/60ZR17 tyre. The 5.5x17" may cause clearance minor issues with a 180/55ZR17 or larger tyre. Add or remove the 2mm shims to your liking.


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1977 R75/7-R100 grey, '87 K100RS red, '93 K11-K12 aka 'Big Block' black, '96 K1100RS black, '98 K1200RS red, '09 K1300GT red, & 2013 R1200RT-Polizia black & white.

    

Dai

Dai
Life time member
Life time member
Nice one, TWB. Another possibility to put on the list when LFB finally gets a clean and rebuild.


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'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California
    

Ringfad

Ringfad
Life time member
Life time member
The 5.5x17" may cause clearance minor issues with a 180/55ZR17 or larger tyre. Add or remove the 2mm shims to your liking.

I tried this with no success, but then changed the tyre to a 170/60 ZR17 and this works well on the 5.5 Rim.

I also have a 5.0 K12 Rim with a 160 tyre and this also works well.

Dai we can possibly discuss as I have only the need for one rear wheel and I now have 2 x K1200 rears.

Note these K12 wheels only fit paralevers.


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Five spoke K12 wheels on a K11/K100/K75 Ir-log10

   ;BMW; K100RS Style Black 1987 105K Km     ;BMW; K1 Black 1993 51K Km     ;BMW; K1100RS Red 1993 70k miles  ;BMW; K100 16V Black (ex ElectricMonk)  ;BMW;  K1100LT (Swiss) soon to be an RS
    

Ringfad

Ringfad
Life time member
Life time member
and don't forget that the front discs (rotors) need to be 305mm to fit the existing callipers, later K1200's had 320 mm discs.


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Five spoke K12 wheels on a K11/K100/K75 Ir-log10

   ;BMW; K100RS Style Black 1987 105K Km     ;BMW; K1 Black 1993 51K Km     ;BMW; K1100RS Red 1993 70k miles  ;BMW; K100 16V Black (ex ElectricMonk)  ;BMW;  K1100LT (Swiss) soon to be an RS
    

Two Wheels Better

Two Wheels Better
Moderator
Moderator
@Ringfad wrote:and don't forget that the front discs (rotors) need to be 305mm to fit the existing callipers, later K1200's had 320 mm discs.

That's right. I am using 305mm discs from an R1150GS, but early R1100S and F800GS work, too. The calipers must not be Evo type.


__________________________________________________

1977 R75/7-R100 grey, '87 K100RS red, '93 K11-K12 aka 'Big Block' black, '96 K1100RS black, '98 K1200RS red, '09 K1300GT red, & 2013 R1200RT-Polizia black & white.

    

cam16v

cam16v
active member
active member
I purchased a front and rear rim off a 2001 K1200LTABS for the swap. 3.5 front and 5.0 rear, for some new 120/70 17 and 160/60 17 rubber. I found a line on two floating disc 305mm rotors off a 2006 R1200GS, the specs ive found of these rims seem to match up unless im missing something; any confirmation?
http://www.r1200gs.info/misc/specs/

What other parts would I need to order to make the swap complete?
(1) 25x47x14 sealed ball bearing is 62005-RS
(2) 25x47x12 sealed bearing which is a 6005-2RS
(3) 25mm between-the-bearings centre spacer is required, part number 36 31 1 458 419  All three bearings and spacer for the front rim?
(4) Any modifications for the rear rim discs to fit?

Sorry if youve already answered this. Im a newbie. Sad

    

Two Wheels Better

Two Wheels Better
Moderator
Moderator
It's a bit more complicated. Go HERE and locate post 36+ for details.


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1977 R75/7-R100 grey, '87 K100RS red, '93 K11-K12 aka 'Big Block' black, '96 K1100RS black, '98 K1200RS red, '09 K1300GT red, & 2013 R1200RT-Polizia black & white.

    

duck

duck
Life time member
Life time member
Not that I wash my bikes very often (except for riding in the rain) but it's easier to clean three spokes than five. Laughing


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Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

RicK G

RicK G
VIP
VIP
Welcome back Duck.
I have said for ages that the guy who designed the Y spoke wheels should be made to spend the rest of his life cleaning them.


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"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

duck

duck
Life time member
Life time member
@RicK G wrote:Welcome back Duck.
I have said for ages that the guy who designed the Y spoke wheels should be made to spend the rest of his life cleaning them.

There is a special seat reserved for him in Hell. (Right next to the guy who designed the stock seats.)


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

11Back to top Go down   Five spoke K12 wheels on a K11/K100/K75 Empty Word of warning on Thu Feb 04, 2016 12:26 pm

xpc316e

xpc316e
Gold member
Gold member
There are some issues with the course of action recommended in this post.


  • There seems to be no industry standard 47 x 25 x 14 bearing that I can find. Catalogues don't list it and bearing suppliers do not even bother responding to my emails. I do however intend to use a 47 x 25 x 12 bearing plus a 2mm spacer.



  • The 25mm bearing spacer quoted as costing about $12 is no longer available. My BMW dealer informed that there are none in stock in the UK, and then searched further to tell me that there are none in stock worldwide. So, used parts are the only option. It was fitted to the K1100RS, the 16vK100RS, and the K1 - take your pick.


So it is not quite as simple as the poster makes out. I have just received a K1200RS front wheel and intend to fit it to my K1100LT after blasting and powder-coating. I shall keep you posted on what happens.


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VIN 0191428, 1991 K100LT, formerly owned by Lancashire Constabulary. This old warhorse is now 'out to grass' and living in retirement in Suffolk, where it will be showered with appropriate love and care.

VIN 6459609, 1992 K1100LT, another ex-Police machine, even though she now looks like she is a former fire engine.
    

12Back to top Go down   Five spoke K12 wheels on a K11/K100/K75 Empty Re: Five spoke K12 wheels on a K11/K100/K75 on Thu Feb 04, 2016 11:07 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
@xpc316e wrote:There are some issues with the course of action recommended in this post. So it is not quite as simple as the poster makes out.
As stated in a later thread about another build, I ended up not using the swap-the-bearings-way and instead had an axle made. This was a simple as it could be.

Here's the thread, start at post number 37. Big Block K100 K12 Wheels


__________________________________________________

1977 R75/7-R100 grey, '87 K100RS red, '93 K11-K12 aka 'Big Block' black, '96 K1100RS black, '98 K1200RS red, '09 K1300GT red, & 2013 R1200RT-Polizia black & white.

    

duck

duck
Life time member
Life time member
I know of a guy who put them on a K11RS.  Custom axle was his approach too.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

beachcomber550

beachcomber550
active member
active member
Worked for me !

Made my own spindle. Simpler and cheaper than all that farting around with spurious bearings


Five spoke K12 wheels on a K11/K100/K75 File



Last edited by beachcomber550 on Sat Sep 14, 2019 9:20 am; edited 1 time in total (Reason for editing : add pic)

    

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