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1Back to top Go down   Rear wheel offset query Empty Rear wheel offset query Tue Apr 02, 2024 2:19 pm

Edition-89

Edition-89
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Hi folks,

I've got an '89 K100RS2V monolever, but have swapped out for a K1100 (paralever) torque arm and final drive due to my driveshaft and final drive splines being knackered.
I'm running the standard K100 Y spoke wheels and find that the rear wheel doesn't sit centrally and is offset towards the swing arm.
Does anyone know enough about the different offsets to let me know what size spacer I would need to get it to sit centrally?
Thanks



Last edited by Edition-89 on Wed Apr 03, 2024 6:22 pm; edited 1 time in total

    

2Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Tue Apr 02, 2024 3:32 pm

92KK 84WW Olaf

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Why not swap for a K100LT 17 inch rear wheel. It will be 3 spoke and takes the same size tyre as you already have but have the correct offset for the Paralever.

You could also use the 18 inch K1100RS wheel but you will need to swap the centre stand for the K100 16v or K1100 type.

That leaves you with needing to consider a 3 spoke front wheel....a K75 3 spoke front wheel should fit but they are hens teeth.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 48,061 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 61,190 miles

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

3Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Tue Apr 02, 2024 4:01 pm

Laitch

Laitch
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The figure BMW allows for maximum offset is in the red box. Included is a formula to derive the offset. The gizmo on the right side of the illustration is BMW's measuring gauge, as a reference. Nobody I know has one.

From BMW's K1100 shop manual
Rear wheel offset query Screen19


__________________________________________________
1995 K75 90,000 miles
    

4Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Tue Apr 02, 2024 8:49 pm

Dai

Dai
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92KK 84WW Olaf wrote:That leaves you with needing to consider a 3 spoke front wheel....a K75 3 spoke front wheel should fit but they are hens teeth.
K75C wheel only.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

5Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Wed Apr 03, 2024 4:21 am

Edition-89

Edition-89
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92KK 84WW Olaf wrote:Why not swap for a K100LT 17 inch rear wheel. It will be 3 spoke and takes the same size tyre as you already have but have the correct offset for the Paralever

I would like to keep the snowflake wheels for aesthetic purposes, I just prefer the look of them over the 3 spoke versions. Plus as you say, I'd then need to try to find a matching front wheel as well.

    

6Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Wed Apr 03, 2024 4:28 am

Edition-89

Edition-89
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Laitch wrote:The figure BMW allows for maximum offset is in the red box. Included is a formula to derive the offset. The gizmo on the right side of the illustration is BMW's measuring gauge, as a reference. Nobody I know has one.

From BMW's K1100 shop manual
Rear wheel offset query Screen19

This is great, thank you for this!

    

7Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Wed Apr 03, 2024 5:24 am

firstle

firstle
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got a 17inch 3 spoke rear here good tyre , buyer collects or arranges collection £50

    

8Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Wed Apr 03, 2024 12:57 pm

charlie99

charlie99
VIP
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The offset is about 15mm 

Problem could be finding wheel bolts long enough to accomodate spacer and wheel 

But not imposible


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

9Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Wed Apr 03, 2024 3:19 pm

92KK 84WW Olaf

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Dai wrote:
92KK 84WW Olaf wrote:That leaves you with needing to consider a 3 spoke front wheel....a K75 3 spoke front wheel should fit but they are hens teeth.
K75C wheel only.

Dai, I have a question for you on this. I have a matching pair of K75 3 spoke wheels. As you mention the K75c does this mean there are two types of K75 3 spoke wheel or only one type?

My plan is to paint these wheels for my 1984 K100 Sprint which I am aware started life as a naked K100. Since it only got new tyres last September they will be on it for another 2 or 3 months and at that point I want to fit the 'new' wheels.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 48,061 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 61,190 miles

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

10Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Wed Apr 03, 2024 3:39 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Edition-89 wrote:Hi folks,
...I'm running the standard K100 snowflake wheels and find that the rear wheel doesn't sit centrally and is offset towards the swing arm.
Thanks
Snowflake wheels were used only on Airheads. Y Spoke wheels were used on some model later Airheads (Monolever) and early K bikes. When you see them side by side it is obvious why the name difference, easily confused.
Rear wheel offset query Airhea10
Snowflake
Rear wheel offset query Y_spok10


__________________________________________________
Patience is something you admire in the driver behind you and scorn in the one ahead.
~Mac McCleary
1977 R75/7-100, '93 K11/K12 Big Block, '95 R100 Mystic, '96 K1100RS, '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & 1st '98 K1200RS.
The Mystic, Big Block, 2nd K1200RS, K12R & K13 are running & ridable.
    

11Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Wed Apr 03, 2024 3:46 pm

Dai

Dai
Life time member
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I'm pretty sure it was TWB that pointed out that the K75C wheel was the only drop-fit replacement for the K100. Other K75 wheels required machining spacers/spindles/somethingorother.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

12Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Wed Apr 03, 2024 4:24 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Dai wrote:I'm pretty sure it was TWB that pointed out that the K75C wheel was the only drop-fit replacement for the K100. Other K75 wheels required machining spacers/spindles/somethingorother.
Having played round with various K bike Y spoke and three spoke wheels over the years, I've always managed to locate one that worked for what I needed it for, but I'm not certain it was me who pointed out proper alignment...as you say.

If we are talking specifically about K75C wheels, just be sure you do not want the 18" rear with drum brake capability only, otherwise it's a 17" rear disc type, as far as my extensive cataloguing suggests for all markets*. Unless we are talking about the later models, which came with three spokers, and are 17" for rear disc brakes. Some basic K75 also used a rear drum 18" wheel.

*BMW parts catalogues are notoriously incorrect, attempting to cover too many bikes and overlapping or omitting useful information.


__________________________________________________
Patience is something you admire in the driver behind you and scorn in the one ahead.
~Mac McCleary
1977 R75/7-100, '93 K11/K12 Big Block, '95 R100 Mystic, '96 K1100RS, '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & 1st '98 K1200RS.
The Mystic, Big Block, 2nd K1200RS, K12R & K13 are running & ridable.
    

13Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Wed Apr 03, 2024 5:31 pm

Suzi Q

Suzi Q
Life time member
Life time member


__________________________________________________
Sometimes I'm not really Suzi Quatro.
    

14Back to top Go down   Rear wheel offset query Empty Re: Rear wheel offset query Wed Apr 03, 2024 6:22 pm

Edition-89

Edition-89
active member
active member
Two Wheels Better wrote:
Edition-89 wrote:Hi folks,
...I'm running the standard K100 snowflake wheels and find that the rear wheel doesn't sit centrally and is offset towards the swing arm.
Thanks
Snowflake wheels were used only on Airheads. Y Spoke wheels were used on some model later Airheads (Monolever) and early K bikes. When you see them side by side it is obvious why the name difference, easily confused.
Rear wheel offset query Airhea10
Snowflake
Rear wheel offset query Y_spok10

Thank you for this, I did indeed mean Y spoke wheels

    

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