Has any one ever heard of a plate that can...

convert say a 122BCD to a 144BCD, im gonna make one.

are you riding 2 brakes?

Years ago shimano stx cranks used a odd way of attching the rings and i think it was middleburn that made an adaptor plate a bit like what your surgesting. Unless you have a cnc lathe wont it look a bit naff tho?

convert say a 122BCD to a 144BCD, im gonna make one.

Why not just buy a chainring with the correct BCD?

are you riding 2 brakes?

no only one.

Why not just buy a chainring with the correct BCD?

They are discontinued.

the amount you are likely to pay for the plate, might be worth getting another set of crank arms.

edit, make one :)

Years ago shimano stx cranks used a odd way of attching the rings and i think it was middleburn that made an adaptor plate a bit like what your surgesting. Unless you have a cnc lathe wont it look a bit naff tho?

Indeed, and to answer, i have a lathe and a mill, CNC no needs gots my DRO.
3mm ali plate nice.

the amount you are likely to pay for the plate, might be worth getting another set of crank arms.

Tis cool i will make it=)

3 on ebay +

http://www.spacycles.co.uk/products.php?plid=m2b2s149p396

3 on ebay +

http://www.spacycles.co.uk/products.php?plid=m2b2s149p396

Wants 1/8th thou.

Wants 1/8th thou.

Buy a 110 BMX one, chop out the middle, and drill some new holes, if you have all the kit.

I think making an adaptor is asking for problems.

Chop out the bits you dont need http://cgi.ebay.co.uk/BMX-CHAINRING_W0QQitemZ250268647774QQcmdZViewItem?hash=item250268647774

Good man xxx

thats not a bad idea,if it goes well you could have a little business

here comes the machining:)