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The original Moulton bicycle front suspension unit fitted inside the steering tube and comprised of a metal spring with a full length rubber core.

Urethane and natural rubber have very good low frequency rebound characteristics, which are non existent in springs functioning in isolation, believe Alex Moulton (designer of the original mini suspension) or some half arsed magazine article back in the day, take your pick. The shore hardness I...

Springs without damping would not be an upgrade, elastomers (polyurethane) has a natural dampening quality, bare springs don't. Use Elastomers, and if you cant afford them make your own, cost about £12 for the urethane and bits and bobs for the molds, the only other expense will be a spray can...

Wheel (700c) and tyre (28mm) = diameter 27" x 34/22 = 41.7", 33% of of 41.7" = 13.7", 41.7"-13.7" = 28" I'll keep and eye on the sun gear, thank you. i'm a little confused by your term "direct drive" ? do you mean 3rd gear on a 4 speed SA or do you mean you'd got rid of all your SA equiped...

Re: Thanks for the nice comments, the frame has not long come off fleabay, the owner bought it new but never built it up.He has just retired to the Isle of White and didn't want to take it with, got caught up in the floods trying to get it too, then the lockdown focused the build up ! Re input...

https://www.flickr.com/photos/126031154 ... ed-public/ i've not long built this to pottle around the forestry tacks of wales. it started with its original forks but coming down long downhill forestry tracks that tend to be very corrugated i quickly decided to fit some contemporary suspension...