Sail Exchange seem to have some in Delrin which could suit? Need to check load ratings.
www.sailexchange.com.au/products/hk-1533?pr_prod_strat=e5_desc&pr_rec_id=38664822f&pr_rec_pid=6639736193220&pr_ref_pid=6639806513348&pr_seq=uniform
or here?
www.dyscmarine.com.au/products/sheave-1-7-1637mm-od-white-delrin?srsltid=AfmBOooXO3ex65TJ-ZW4EfwFNfsDSTMXhojQkBZqpJjjEcRIOzbImYb1
Assume you have considered just reverse engineering them and machining some up from Nylatron or Delrin or Acetal etc? Dotmar are excellent - Canning Vale would be able to do them but cost could be unpalatable........
www.dotmar.com.au/applications/sheaves-and-pulleys
Similar article
forums.ybw.com/threads/genoa-car-replacement-sheave.614326/
Materials
m-p.com/custom-machined-nylon-sheaves/
US company doing them - as an example would obviously be cost prohibitive.........
www.zephyrwerks.com/rebuild-repair

Posting for OP

Ramona said..

DezzyD said..
I have a 1974 S&S 30 and need to replace the old sheaves in the cars. I can't find them anywhere. Unfortunately i can't post a photo as I am a newbie. The measurements are. 50mm od. 10mm centre. 35 mm wide. it is fully nylon - no bearings. The sheaves have just perished over the years. I can get everything else working. Just a huge difference in price between buying a nylon sheave and buying a new car. They all need replacing so it will get pricey. Thanks for your help.

You need a mate with a lathe. Buy some black 50mm Delrin rod off Ebay. It's cheap and easy to work. Find a pensioner with a workshop in your neighbourhood.

Mens shed maybe be able to help

Thanks everyone,
I was searching for ages trying to find these rollers. A friend recommended i go on a forum and ask. i have read the forum before but never engaged. This is brilliant. Buying the rod and heading over to a mate with a lathe. This has saved me a lot of money. Thanks everyone for your help.
Another question while I am going. The Genoa track, is made up of 2 peices that don't quite aline. any thoughts there? I am thinking of loosening the screws, clamping it across and tightening them again hoping that they grab at a different spot. Is this a waste of time. Am I better to remove the track completely. take out the timber packer and renew and drill new screws. Don't want to do more than I need.

DezzyD said..
Thanks everyone,
I was searching for ages trying to find these rollers. A friend recommended i go on a forum and ask. i have read the forum before but never engaged. This is brilliant. Buying the rod and heading over to a mate with a lathe. This has saved me a lot of money. Thanks everyone for your help.
Another question while I am going. The Genoa track, is made up of 2 peices that don't quite aline. any thoughts there? I am thinking of loosening the screws, clamping it across and tightening them again hoping that they grab at a different spot. Is this a waste of time. Am I better to remove the track completely. take out the timber packer and renew and drill new screws. Don't want to do more than I need.

Depends where the join is. Most people don't move the cars very much. If you have a furling headsail the car is in the right spot no matter how much sail is out. If it's just for appearance, then move the unused piece and fill the gap with JB_Weld.