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prototype dp firebird freestyler

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winnit93:
just been doing a mock up build to see what the issues are with the chain





you can see here where the chain touches the frame



at the moment the chain only just touchs the frame im thinking of heating the part up and bending it out slightly so the chain runs free but not sure yet.

big thanks to firebird steve and poolysherrif for there help so far  :daumenhoch:

monkian:
If there's room, would it help if you put the chainring on the inside of the spider? ???

Jaymz:
thats a bit of a quandry isnt it, nice frame though.

controversial thought here but how about having the tube indented like they do with some chainstays behind the chainwheel to give clearance to the chain, as the chainwheel and freewheel look to be inline so moving the chainwheel inwards would only make the chain run at an angle and put undue pressure on it.

skki3330:

--- Quote from: monkian on May 20, 2011, 12:51 PM ---If there's room, would it help if you put the chainring on the inside of the spider? ???

--- End quote ---

Good idea

Gnarlyscoots:
I was going to add that you should consider a smaller chainring, 36T or 38T and mount on the inside of the spider. Then try and get hold of a 13T or 14T rear freewheel or change your hubs for a Shimano cassette 14T  :daumenhoch:

Might help you get round the heating and bending of the frame  :coolsmiley:

Tj

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