Senior VR Member
Join Date: Jul 2008
Location: Second Star to the right, then straight on till morning.
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No. You cannot fit a larger wheel on the back of the bike. In fact, the largest tire you can fit is a 200mm, but that is only if you have the suspension set to its max setting to prevent it from bottoming out on the fender. If you have it lowered at all, it will not work, period. The issue is side clearance, as there is only about 3.5 mm between the sidewall and the propeller shaft housing.
Besides, there are no aftermaket rear wheels that we are aware of. The shaft drive is unique to Suzuki and they don't sell all that many C50s to justify any sort of production demand.
Current Bikes -->
-1969 Indian MX125 -10-2009 to Present
-2014 Honda CTX1300 - 05-2015 to Present
Past Bikes ----->
-1973 Yamaha RD350
-1991 Harley Sportster 883 XL
-2000 Yamaha XV125
-2003 Piaggio Fly
-2004 Suzuki LS650 - 04-2005 to 07-2008
-2005 Boulevard C50 - 07-2008 to 5-2012
-2012 Vulcan 900 - 05-2012 to 05-2015
-2008 Yamaha FZ6 - 11-2008 to 04-2017
-2006 Star Virago - 05-2011 to 06-2017