Originally Posted by
rplevinton
Good morning, I have an older Trek Hybrid FX 7.1. I had to order a new rear wheel (Quality Wheels Shimano Tiagra RS400/Alex DA22 / 700c) to replace my Bontrager AT-750 wheel that I can not find anymore. I'd like to use the Shimano MF-TZ31 Freewheel gear set from my old wheel but the removal tool recommended to me (Park Tool 5.2) is slight too big. My question(s) is: Should I just consider getting a new Freewheel (either a Shimano MF-TZ31 or one comparable) or does anyone know of a removal tool that WILL fit the Shimano MF-TZ31? Any help/suggestions would be greatly appreciated! Thank you
UPDATE:
Thank you to all who replied to my post above. I've decided to take
alcjphil advice and buy a new 7 gear cassette with a 4.5mm spacer. Seems to make the most sense to me
You may also need a 1.8mm or 1.85mm spacer (I've seen both sold for what I'm about to describe).
An 11-speed compatible Shimano Hyperglide road freehub is approximately 37mm in length. The older 8/9/10 speed freehub was about 35mm as I recall; the 7-speed, a bit less than 31mm.
A 4.5mm spacer (I've also seen 4mm spacers sold for this purpose) was/is needed to use a 7-speed cassette
with the 8/9/10mm freehub. But a 8/9/10-speed freehub is only about 35mm wide, not roughly 37mm.
Since the a 10/11 speed freehub is wider, Shimano specifies a 1.85mm spacer if using a 8- or 9-speed cassette with an 11-speed freehub. (With a 10-speed cassette on the 8/9/10-speed freehub, you'll also-need a 1mm spacer - a 10-speed cassette is actually about 1mm narrower than the 8 and 9-speed cassettes).
Since the 10/11-speed freehub is wider than the 8/9/10-speed, both spacers thus should be required to use a 7-speed cassette on a 10/11 speed freehub.
https://bike.bikegremlin.com/1259/bi...compatibility/
See the section titled "11-speed road freehub".