Can anyone help, building a Trifield but not sure what swinging arm to use. 

The frame is 1958 but the existing swinging arm will only allow a 17inch rear wheel. Any ideas! And does anyone have one. 

Thanks 

JOJOTUT

built trifield useing a james oval swingarm  just doing a velofield with a widened 3ta arm that has been widened

Thanks

Would a 3ta arm do if its modified they are a lot cheaper than an RE one 

1 hour ago, jojotut said:

Thanks

Would a 3ta arm do if its modified they are a lot cheaper than an RE one 

the 3ta was already in the frame when got it it has been widened by about 1 inch the frame had a b 40 engine before i bought it so i left it alone

i think royal enfield swingarm easier to get , you sometime need to wait on ebay for right affordable parts ? what is tyre you are planning to put 4.0 x 18 ?

Yep a 18inch rear wheel, just after anything that will fit or can be modified. 

Thanks