78 18" rear rim on an 81 CX500...

859 Views 7 Replies 3 Participants Last post by Allan, Jun 9, 2011

cdyoung1985

Discussion Starter · Jun 8, 2011

So I picked up a set of revers comstars from a fellow member in a trade, didn't notice that the rear was an 18", and my 81, being a non-78, has a 16", can I just put a new tire on it and mount it up? Am I likely to have any issues? Before I noticed it was an 18" I removed the ancient dry rotted tire, which was a royal PITA to get off, even with a car tire removing machine, I know, it's a car machine, not a bike tire remover, but it beats the hell out of fighting with it myself... Anyway, I didn't feel like fighting it back on, and so putting it in place with no tire wouldn't show if it's going to rub, and I'm not some rich guy who can buy a new tire to see if it'll fit or not...

PS, sorry if this topic's been around a bunch, when it comes to searching 78 18" rim on 81 with a 16", none of the words showed up, although I could have used wheel, and searched through every topic with the word wheel in it, and 3 years later, if I dedicated 8 hrs a day, 7 days a week to reading through them, probably would have found my answer, but I don't have that kinda time...

Save

1 - 8 of 8 Posts

Allan

· #2 · Jun 8, 2011

My link

Save

bandit

· #3 · Jun 9, 2011

its an easy mod. and well worth doing.imo.

i did it last year.better fuel consumption and lowers the revs.

at 5k rpm my bike runs a tad over 60 mph

See less See more

Save

cdyoung1985

Discussion Starter · #4 · Jun 9, 2011

Sweet, thanks for the info guys

Save

bandit

· #5 · Jun 9, 2011

cdyoung1985 said:
Sweet, thanks for the info guys

forgot to say......you wont then join the thread of wanting a 6th gear,cause i dont wont one

See less See more

Save

cdyoung1985

Discussion Starter · #6 · Jun 9, 2011

I still would, make it as tall as the bike can handle it, so you can hold your speed in it, but have to down shift to speed up just so the bike is at 4-5k at 70, which would greatly improve mileage

Save

bandit

· #7 · Jun 9, 2011

cdyoung1985 said:
I still would, make it as tall as the bike can handle it, so you can hold your speed in it, but have to down shift to speed up just so the bike is at 4-5k at 70, which would greatly improve mileage

mmm,not sure you have that right,no matter.

you cant have it at both ends

See less See more

Save

Allan

· #8 · Jun 9, 2011

Just to clarify,,in North America, Reverse Comstars came on most of the 1979 and later bikes,,they are the black wheels with the 16 inch rear.

Comstars are the silver type that came on the 1978's and have the 18 inch rear.

Save

1 - 8 of 8 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.

Top Contributors this Month