Tyrell - is it necessary to shift into the largest cog (lowest gear) to keep the chain on the bike when the frame is folded?
Originally Posted by
mconlonx
Is he paying B&M royalties on the Birdy design...?
In the real world (as opposed to the folding bikes forum) patents cover specific design elements rather than general concepts and expire in under a couple of decades rather than continue in perpetuity.