Author Topic: C15 Wheel Offset  (Read 121 times)

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ADROMAR59

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C15 Wheel Offset
« on: 20 May, 2018, 21:39:54 »
I have a box of bits to build a 65 C15.
I stripped the old rims off as they were too rusty, I have new Stainless rims, spokes, new nipples.
In my haste I forgot to check the offset, I am used to Jap bikes which generally have no offset to the hub.
I have looked back through the forum & can't see any reference to this.
If there is an offset, which side is it offset from?
Schoolboy error, but your help is appreciated.
Many thanks
Adrian

AWJDThumper

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Re: C15 Wheel Offset
« Reply #1 on: 20 May, 2018, 22:27:29 »
Adrian. I rebuilt a pair of 17" C15 wheels a few months ago and posted what the front wheel offset was a couple of weeks ago. From memory, the front LH wheel offset was 20mm measured from the LH end of the hub.  The link below should take you to my posting otherwise simply search for '20mm'. The back wheel is presently on the bike but I will see if I can measure the offset for you tomorrow.

https://www.bsaownersclub.co.uk/bsaoc_forum/index.php?topic=3171.msg15387#msg15387

ADROMAR59

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Re: C15 Wheel Offset
« Reply #2 on: 21 May, 2018, 06:57:19 »
Thanks for that.
I thought I had seen a posting somewhere, but I couldn't find it when I needed it.
Excellent.
Thank you.

AWJDThumper

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Re: C15 Wheel Offset
« Reply #3 on: 21 May, 2018, 17:33:48 »
It didn't want to remove the back wheel from my C15 but managed to measure the LH offset relative to the LH side of the full width hub (I managed to get a narrow straight edge between the hub and the chain wheel. The measured offset was 4mm which corresponds to the offset of the original wheel before the rebuild. With this offset, the tyre and rim appear to be centred relative the swinging arm bushes confirming it should be correct.

ADROMAR59

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Re: C15 Wheel Offset
« Reply #4 on: 21 May, 2018, 21:11:10 »
Many thanks for taking the trouble to check for me.
Regards
Adrian

AWJDThumper

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Re: C15 Wheel Offset
« Reply #5 on: 22 May, 2018, 07:44:29 »
No Problem. What size rims are you going for: 17" or 18"?

ADROMAR59

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Re: C15 Wheel Offset
« Reply #6 on: 22 May, 2018, 11:54:19 »
I have gone for 18"
I know it is not original, but I prefer the look.

AWJDThumper

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Re: C15 Wheel Offset
« Reply #7 on: 22 May, 2018, 12:06:06 »
I think either way is ok. I chose 17" simply because I restore bikes to their original factory spec.

JulianS

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Re: C15 Wheel Offset
« Reply #8 on: 22 May, 2018, 12:07:23 »
Worth checking that your centre stand will still function - will be long enough - with larger wheels.