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Offline cappra

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respoking problem
« on: March 19, 2011, 09:48:48 am »
Been lacing wheels for many years, but here is my problem.
I'm going from an 18" mx rim to a 19" inch rim to be used for flat track.
I ordered spokes one inch longer than  stock.  I got the wheel laced, but
the spoke lengths are too long and have run out of spoke thread.  Is adding
1 inch in spoke length the wrong to go about it?  Does the mx rear wheel with a conical
hub causing a problem?  The mx rim is a 2.15 Akront and the rim I am using is a 1.85.  What am I missing?
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3BT

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Re: respoking problem
« Reply #1 on: March 19, 2011, 09:54:20 am »
Shouldn't they have been 1/2" longer. (plus 1" on dia)
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Offline Davey Crocket

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Re: respoking problem
« Reply #2 on: March 19, 2011, 10:26:15 am »
Doh!!!! ;D
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Offline vandy010

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Re: respoking problem
« Reply #3 on: March 19, 2011, 10:27:24 am »
3BT's on the money.
it's all simple maths really :)
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Offline cappra

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Re: respoking problem
« Reply #4 on: March 19, 2011, 11:28:22 am »
I'm a dope  :-[  Thanks for the answer..  I can always
count on this board for clarity!
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Offline AdamN

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Re: respoking problem
« Reply #5 on: March 19, 2011, 11:50:43 am »
find a 20" rim and they should fit no problems ;D

Adam
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Offline jerry

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Re: respoking problem
« Reply #6 on: March 19, 2011, 12:00:27 pm »
Like working on a lathe. Take it off the radius not the diameter sort of!
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oldfart

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Re: respoking problem
« Reply #7 on: March 19, 2011, 12:51:18 pm »
Jerry ...been down that track before. ???
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Offline Maicojames

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Re: respoking problem
« Reply #8 on: March 19, 2011, 12:54:27 pm »
Hi Jed..don't feel bad I have done much worse far too many times. going to re-lace my Husky 390 wheels after I polish the spokes and rims( in good shape but ugly-I can polish for almost no $). I sure hope to make it out to Az in a year or so too. Is it possible to have spokes cut and threaded ( does Buchanan's offer this service)?
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Offline LWC82PE

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Re: respoking problem
« Reply #9 on: March 19, 2011, 03:04:10 pm »
YES Buchanans can make you any spoke you want. They also manufacture spoke sets for various brands world wide. I have bought spoke sets for Triumphs from British spares in NZ and they ended up being Buchanans, so British spares is getting spoke kits made in USA.
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Offline cappra

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Re: respoking problem
« Reply #10 on: March 19, 2011, 05:11:46 pm »
These were Buchanan spokes.  I found a local wheel shop that will cut 1/2" off the spokes
and rethread them, but I need to check to see the price per spoke to do this as it might
be cheaper just to order 36 spokes from Buchanan (I'm a dealer) and start over.
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Offline PEZBerq

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Re: respoking problem
« Reply #11 on: March 19, 2011, 07:30:29 pm »
I think you will find spoke threads are rolled and not cut. They are a weird size thread so it might pay to check out what is being proposed.
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Offline Daryl Jones

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Re: respoking problem
« Reply #12 on: March 19, 2011, 11:54:14 pm »
Looks easy....
Lots of subtle differences to cause problems:

Cross patterns, Offset of nipple holes from centre line (may be different for different width rims)
Different spoke lengths used for conical hubs(and often spoke diameters too),
Angle and clearance of bends in spokes to suit hub and rim.
Offsets of hub flanges from the centreline (usually to align sprockets or clearance for cush drive)
Angle and clearance of dimples & nipple holes pre-drilled in rim to suit original application.
Eg: Does the first dimple to the right of the valve stem hole point upwards or down?

If anyone needs advise from an expert I have used and recommend John Titman Racing Services
http://www.jtr.com.au/john_titman/index.htm

cheers, DJ
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Offline jimg1au

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Re: respoking problem
« Reply #13 on: March 20, 2011, 08:00:04 am »
cappra
why are you going to use a 19 wheel there is only speedway tyres.much better tyres in 18 for dirtrack
jim
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Offline cappra

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Re: respoking problem
« Reply #14 on: March 20, 2011, 08:45:40 am »
The majority of flat trackers here in Arizona and California are using 19'' rims on both ends.
There is a good supply of 19" tires from Maxxis, Pirelli and Goodyear/Dunlop.
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