Forum

[ScottH]

Hi, does anybody have a rear sprocket template for a crusader? I'm in the process of converting the bike for long distance trials. Thanks.

[Mark M]

Scott, I'm not sure what you want. If you are going to get a bigger sprocket welded on to the original brake drum (which is the only practical way to increase the tooth count on the integral drum,) just buy a sprocket blank in the right size and get the old one turned off, new blank bored to size and welded on. I have done this several times and it works fine, get a good welder who won't overheat the drum and distort it. Incidentally you can't go smaller on the rear drum as there isn't enough meat for a smaller sprocket. If you can't do this stuff yourself try Supersprox (Google them) who do this work all the time.

REgards, Mark

[ScottH]

Thanks Mark, I'm new to this, who sells blank sprockets of the right pitch? After further investigation last night I realised that I can drop my drive sprocket from 17t to 15t which will be almost the same as putting a 56t sprocket on the rear instead of the standard 49t.

Thanks,

Scott.

[Mark M]

Hi Scott, most engineering supply firms do sprocket blanks if you tell them what size of chain. Alternatively (probably best,) just ship the whole thing to Supersprox.

REgards, Mark