Whilst this will be old news to most of you old timers, I've noticed a lot of cassettes on ebay recently being mis sold as HG90 or HG70 when they are not. These cassettes now go for premium ( or silly as i call it) money. I would hate to see a fellow retrobiker end up dissapointed.
The 7 speed era cassettes from around 1990 have different finishes to them, although this can be hard to see in isolation or if dirty.
Whilst i have one of each cleared up, i thought i would post a picture of the difference.
The main thing is the finish coating on the cassette as all the cogs are stamp formed in the same way.
HG90 XT spec, have an chrome mirror finish to them. The cogs are no different and the finish is purely for advanced corrosion resistance..
HG70 Deore spec are still shiner than the lower grade cassettes, but are zinc / nickel plated.
Both weigh in at around 320g
Keep you eyes open. If want a genuine XT HG90 i know bicyclist.cc did have them a while back for reasonable money.
All the best.
The 7 speed era cassettes from around 1990 have different finishes to them, although this can be hard to see in isolation or if dirty.
Whilst i have one of each cleared up, i thought i would post a picture of the difference.
The main thing is the finish coating on the cassette as all the cogs are stamp formed in the same way.
HG90 XT spec, have an chrome mirror finish to them. The cogs are no different and the finish is purely for advanced corrosion resistance..
HG70 Deore spec are still shiner than the lower grade cassettes, but are zinc / nickel plated.
Both weigh in at around 320g
Keep you eyes open. If want a genuine XT HG90 i know bicyclist.cc did have them a while back for reasonable money.
All the best.