Ging was one ,kinda worked
Some had a simple block the chain slid against but it was crap,the better ones used a jockey wheel much like surly of today
I cant remember either of topeak or minoura making a tensioner :?
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.