Hi Everyone... I was hoping you could help a newbie out. I'm relatively (6-8 mos) new to cycling, and I decided to build a dedicated commuter, hopefully something with a little style.

I found a 1989 Schwinn World (not sport) for $60 on CL and scooped it up, but as I'm learning more about the bike, I can't seem to identify the derailleurs. The shifters and rear derailleur are simply marked "Shimano SIS," and the front derailleur is marked only "Shimano."

The only group that Shimano called "Shimano SIS" was a MTB group from the early 90's. Everything else that I can find is "Shimano Exage SIS" or "105 SIS" and so on. I imagine this is a simple question, but I want to know as much as I can about what I'm riding.

Thanks in advance.

https://www.velobase.com/ViewSingleCo...eb15c&Enum=108

does it look like this?

if not... velobase.com is best at identifying parts from major companies like shimano or campa... just browse around and you'll find what you're looking for.

On the rear of the derailleur you should be able to find a model number... This should help in identifying the group.

I'm kind of thinking that there was a bike in my stable at one time that was simply marked as you say yours is. It was lower end...a Jazz mountain bike from the early 90's..like 91.

Your results may differ.

Kevin

Hi DJ. when SIS first appeared on the lowend bikes the parts were simply maked 'shimano SIS' just like yours. does hte rear wheel bolt on or is it QR? for bikes from that time period that is a better indicator of quality. and a Chromoly fork rather than a HiTensil

Thanks for the guidance, everyone. I figured it out via Velospace. Looks like it's a Shimano Light Action RD-L541.

It seems that the Light Action group was more sport than a true road group, but what would that group be comparable today? Something in the Acera range?

Thanks again!

yes light action was more for sport touring and recreational bikes. the parts the are marked simply Shimano SIS would be equal to whater is low end today.