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  #1 (permalink)  
Old 07-30-2007, 07:28 PM
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05 Sporty w/ 180 tire

OK,
putting an 18 x 5.5 wheel with a metzeler 180/55-18 tire on my 05 XLC. Just ordered the chain conversion from Zippers but was told I 'probably' would not need an offset tranny sprocket. don't have the wheels here yet so I can't tell for sure.
Has anyone got any experience with this mod and can give me some offset requirement info as well as spacers needed for the rear axle? Any help would be great.
Thanks,
Bob
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  #2 (permalink)  
Old 07-31-2007, 07:55 AM
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I would get wheel in hand, install rear sprocket, put tire in center of frame and then figure out the front sprocket. Your starting point is rear sprocket. Front must be made to line up with it. Spacers are last thing to worry about once above is lined up perfectly. They can be made in any length to fill the space. Plenty of folks make spacers from PVC pipe first to get it right simply and cheap, then have some machined from steel or buy some if you are lucky and find some stock length ones that work.
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Old 07-31-2007, 09:28 AM
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Thanks man!
I don't think I would have thought of the PVC pipe trick that's for sure. I appreciate the info.
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Old 07-31-2007, 09:43 AM
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you will proubley need a .53 offset sprocket.
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Old 07-31-2007, 09:59 AM
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Thanks Butcher. Do you know how a 50 wheel sprocket / 24 tranny sprocket set will compare to the stock 68/29 belt drive?
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Old 07-31-2007, 11:08 AM
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tou need a 51 toothw/ a 24 tooth front, or 23 front and 49 rear.
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Old 07-31-2007, 11:22 AM
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Quote:
Originally Posted by Bob29
Thanks Butcher. Do you know how a 50 wheel sprocket / 24 tranny sprocket set will compare to the stock 68/29 belt drive?
Math time. You gotta figure out what you want. Your new wheel/tire combo is probably a different diameter from stock. Maybe larger or maybe smaller OD. Calculate the difference in circumference. You know pie are square not round and all that high school stuff? Once you know what differece you got in rolling diameter you can start to figure out what you want to do in gearing.
Maybe you want to cruise at lower rpms, or maybe you want a stoplight screamer. You have to decide. That all goes into determining the gearing you want. I'm using a 22/46 on mine cause I wanted to go 70 mph and not get buzzzed to death. But my bike is 400 pounds dry.

Your 68 divided by 29 is 2.34 ratio. Your 50/24 is 2.08. Prettty big difference unless your tire OD changes. You will cruise at lower rpms but loose acceleration.

Last edited by woodhawg; 07-31-2007 at 11:26 AM..
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Old 07-04-2013, 10:43 PM
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smaller on front =faster, bigger rear means quicker ,but will top out slow, try to find a happy medium , if your going to ride with no passengers, bigger on front is funner , you can have a lot of fun on long roads or highways
, i myself dont like to shift a lot, i dont like being in 5th just to get to the station a block away if you get me
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