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#294884 - 01/20/10 5:15 pm Wheel Offset A65 1967  
Joined: Aug 2007
Posts: 48
rightshifter Offline
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rightshifter  Offline
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Butler PA
Has anyone made a list of the factory wheel offsets for the BSA. I am looking for a 1967 A65 Lighting offset for the front and rear wheel.
Thanks

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#294921 - 01/20/10 8:05 pm Re: Wheel Offset A65 1967 [Re: rightshifter]  
Joined: Aug 2001
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D.Bachtel Online content
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D.Bachtel  Online Content
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Posts: 2,401
SLO County, CA
Many will tell you to relace and center the wheels in place on the bike. This is the best way to insure proper spacing, clearance and alignment...

If you have the original wheel and they are correctly positioned you can use those as a guide. Place the wheel on the brake drum face on a flat surface and measure the offset either under the rim or the drum itself with drill bits or round stock. A drill index full of all sizes works for me...

Don in Nipomo


1956 Zundapp KS601EL
1960 Greeves Scottish/Hawkstone Velorex 560
1963 BSA Gold Star Spitfire
1964 Triumph T20SM
1965 BSA C15T
1966 BSA VE
1968 Bonham Tote Gote
1969 BSA VS
1970 BSA A65L (with a "Y")
1972 Husqvarna 450 WR
1986 Yamaha TT 225
1987 BMW K75C
#294930 - 01/20/10 9:12 pm Re: Wheel Offset A65 1967 [Re: D.Bachtel]  
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rightshifter Offline
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rightshifter  Offline
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Butler PA
Thanks for the reply, but,the wheel is is pieces and ready to lace. I measured two old ones and they have two differet measurements. There has to be a list somewhere with this information. The factory did not lace these on the bikes.

#294974 - 01/21/10 12:29 am Re: Wheel Offset A65 1967 [Re: rightshifter]  
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stevehi1 Offline
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Dartmouth NOva Scotia
Try installing the two old ones on the bike. And go with the measure that fits the bike the best.


1969 A65L
1969 A65TC
2005 FLHTI
2007 Vespa LXV 150
#294980 - 01/21/10 12:59 am Re: Wheel Offset A65 1967 [Re: stevehi1]  
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rightshifter Offline
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rightshifter  Offline
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Butler PA
The bike is still in pieces, out to be painted. Can't try that yet. Just wanted to get things ready when the parts come back.
Thanks

#295005 - 01/21/10 3:19 am Re: Wheel Offset A65 1967 [Re: rightshifter]  
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D.Bachtel Online content
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D.Bachtel  Online Content
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SLO County, CA
Lace them up loosely right now then, your offset will pull over easy enough when it's time to fit up. Every bike varies a bit, you'll never know for sure til you mount them on the bike.

Your spoke/nipple supplier/wheel building shop should be able to supply you with a figure... they do offsets all day long.

Don in Nipomo


1956 Zundapp KS601EL
1960 Greeves Scottish/Hawkstone Velorex 560
1963 BSA Gold Star Spitfire
1964 Triumph T20SM
1965 BSA C15T
1966 BSA VE
1968 Bonham Tote Gote
1969 BSA VS
1970 BSA A65L (with a "Y")
1972 Husqvarna 450 WR
1986 Yamaha TT 225
1987 BMW K75C
#295202 - 01/22/10 9:15 am Re: Wheel Offset A65 1967 [Re: D.Bachtel]  
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BrizzoBrit Offline
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BrizzoBrit  Offline

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Posts: 721
Brisbane, Australia
G'day,

I had this problem when I did my rear wheel. For the rear, SRM gave me an offset of 7/16" between a straight edge laid over the outer edge of the splines on the drive side of the hub and the rim (ie 7/16" gap between the straight edge and rim). If you need a diagram, I'll scan what they sent to me and send it through. This was for a WM3 alloy flanged rim and I'm thinking it would be much the same for a steel rim.

Can't help with a a '67 hub but for the late 68-70 hub the rim is flush with the edge of the drum on the backing plate side. Looking at 2 wheels in my shed one on a '66 hornet and the other off anything (swap meet item), for the front the edge of the rim would lie pretty much in line with the first or second fin going outwards fron the spoke flange on the backing plate side. HTH.

BTW I spent a couple of years in Pittsburgh in the late 90's. So not far from you.

Cheers
Ray

Last edited by BrizzoBrit; 01/22/10 9:26 am.

BSA 1969 A65F
BSA 1966 A65H
Triumph 1968 T120
Kawasaki A1R
& too many projects!
#295208 - 01/22/10 10:33 am Re: Wheel Offset A65 1967 [Re: BrizzoBrit]  
Joined: May 2004
Posts: 3,548
BSA_WM20 Online content
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BSA_WM20  Online Content
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Sydney Australia
I have never seen such a table and several times started to do one but as you have already found out there seems to be little consistency.
There are some odd dealers sheets giving notice as to a change ut they are usually specific to one bike.


Bike Beesa
Trevor
#295221 - 01/22/10 1:35 pm Re: Wheel Offset A65 1967 [Re: BSA_WM20]  
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rightshifter Offline
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Butler PA
Thanks for the replys, I am will lace them up loose and fit them when the parts return. Thanks for all the help.

#295278 - 01/22/10 7:45 pm Re: Wheel Offset A65 1967 [Re: rightshifter]  
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dave - NV Offline
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Elko, Nevada USA
I would suggest Not being concerned with 'offsets' if you have the bike at hand. Roughly assemble the wheel on the bench and finnish the project on the bike. Pull up a stool and have at it. BTW, I have a nice Rowe wheel building stand I seldom use.

With the bike up on prop stands, spoke the front wheel to center the rim between the fork legs and running true.

With long straight edges (I use 1" alu tubing) clamped to the front rim and held dead parallel beneath the bike extending either side of the rear rim. If the front rim is narrower than the rear, tape on amd shim with some thin, ~ 1/4" wood moulding trim.

Spoke the rear rim to center it between the straight edges and running true. Using a dial indicator you can usually get a good rim within 20-40 thou both radial and axial run out.

Be Sure to use a proper wide jaw spoke wrench and not a bodge crescent wrench or something. You can make a perfect fitting wrench by fileing the gap in a japper mm spoke wrench from your local dealer.
Insure the spokes are equally tight by the 'ding' sounds when tapped.
If fitting SS spokes, be sure to lube the threads.
Grind down any protruding spoke ends inside the rim.

Do it right. It might take a couple of evenings the first time, depending on the beer supply... but that's OK.

Last edited by dave - NV; 01/22/10 8:05 pm.

dave - NV
#295279 - 01/22/10 7:53 pm Re: Wheel Offset A65 1967 [Re: rightshifter]  
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Gordo in Comox Offline
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Comox BC Canada
The issue is really where the centre of the rim should be for the application. Before I take a rim off a hub I first measure the offset of both rim edges in relation some key points on the hub. Then I measure the width of the rim and convert the measured offsets to the rim centre. With this data I am able to use a different rim without worrying about any difference in the width. I am not sure that new rims are always the exact same width for any given size. I am always leery about an offset given from only one side of the hub without a discussion of the exact width of the rim in question.

Gordo


Without frequent roadside repairs there is no fun in riding!
#295283 - 01/22/10 8:04 pm Re: Wheel Offset A65 1967 [Re: Gordo in Comox]  
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Posts: 2,401
D.Bachtel Online content
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SLO County, CA
Good points on the retrofit of different width rims Gordo!
Thanks.

Dave... you're way too modest, even I can achieve 10 to 20 thou axial and radial with a good used rim and two dial indicators!

Don in Nipomo


1956 Zundapp KS601EL
1960 Greeves Scottish/Hawkstone Velorex 560
1963 BSA Gold Star Spitfire
1964 Triumph T20SM
1965 BSA C15T
1966 BSA VE
1968 Bonham Tote Gote
1969 BSA VS
1970 BSA A65L (with a "Y")
1972 Husqvarna 450 WR
1986 Yamaha TT 225
1987 BMW K75C
#295303 - 01/22/10 11:10 pm Re: Wheel Offset A65 1967 [Re: D.Bachtel]  
Joined: Mar 2005
Posts: 9,971
John Healy Online content
John Healy  Online Content


Joined: Mar 2005
Posts: 9,971
Boston, Massachusetts
Quote:
If fitting SS spokes, be sure to lube the threads.


And if using stainless steel nipples, also be sure to lubricate the nipple where it bears on the rim.

Failing to do this can cause the contact area of the nipple/rim to gaul. This can lead to the head of the nipple physically reaming out the nipple hole in the rim as the nipple is being tightened. The result is a rim that will have to be replaced.
John Healy


#295334 - 01/23/10 3:38 am Re: Wheel Offset A65 1967 [Re: John Healy]  
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Gary E Offline
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Gary E  Offline
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Medford, Oregon
Wow, you guys are good. I can never get an original rim that close to true where the welded hump is.


1967 BSA Wasp
1967 BSA Hornet (West Coast Model)
1967 BSA Hornet (East Coast Model)
1968 BSA Firebird Scrambler
1968 BSA Spitfire Mark IV
#295341 - 01/23/10 5:22 am Re: Wheel Offset A65 1967 [Re: Gary E]  
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D.Bachtel Online content
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D.Bachtel  Online Content
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SLO County, CA
No,no,no... the weld is always way off the dials and beyond my parameters.

I try to ignore the big bump. Alloy and cast wheels are better.

Don in Nipomo


1956 Zundapp KS601EL
1960 Greeves Scottish/Hawkstone Velorex 560
1963 BSA Gold Star Spitfire
1964 Triumph T20SM
1965 BSA C15T
1966 BSA VE
1968 Bonham Tote Gote
1969 BSA VS
1970 BSA A65L (with a "Y")
1972 Husqvarna 450 WR
1986 Yamaha TT 225
1987 BMW K75C
#295739 - 01/25/10 7:45 pm Re: Wheel Offset A65 1967 [Re: D.Bachtel]  
Joined: Jun 2009
Posts: 292
CAB Offline
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CAB  Offline
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Posts: 292
UK
Hello

My BSA workshop manual (1966/1967/1968 500 & 650 Unit Construction Twins) quotes the following:

Quick-release rear wheels, are built with the rim central to the spoke flanges.

Quick-release front wheels are built with the edge of the brake drum 1-15/16 in. from the centre line of the rim.

190 mm. brake wheels using WM2 or WM1 alloy or steel rims are built with the edge of the rim 7/8 in. from the right-hand hub barrel end.

Regards

CAB


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