Sorting a bike for a friend and I'm pretty sure the freehub is toast (very dry). It's not a design I recognise. It's from a trek 8.2 hybrid, year unknown though I think in the 10years+ old range. It's a cup and cone hub which until I started looking for markings under the dirt I was expecting to find was a cheap Shimano. There are no markings on the hub and just 'h f H' stamped into the freehub splines and POM1 on the drive side seal. Expecting it'll need a bug Allen key to remove once I've got the axle out.
I'll add photos in the morning.
HFH means “hyperglide free hub” I think. Whether actual shimano or “compatible” I don’t know. Cup n cone though suggest either Shimano or something really cheap.
Either way I’d just strip it all down then assuming cups and cones are good, replace bearings and grease up as needed regardless of what make it is. Freehub a are generally serviceable, even when they say they’re not - just less sympathetically designed for disassembly.
According to the trek site the rear hub is a Formula FM31
https://www.trekbikes.com/gb/en_GB/bikes/hybrid-bikes/dual-sport-bikes/dual-sport/8-2-ds/p/16500/
You say its a freehub, but the hub above takes a freewheel, so its either a different hub/wheel or maybe not the bike in the link.
Does the freehub look like this ?
Well I got the model wrong, its a 2011 FX 7.3. Found the spec from the Trek model archive via dyna-ti's link. Looks like the wheels have been replaced though as it should have bontrager rims and it actually has mach 1 240 rims.
It is definitely a freehub, I've had the cassette off. Going to give servicing the freehub a go and if it is truly stuffed looks like wheel with the same rim is only around £45 anyway. Need to service the main hub bearings anyway so nothing to loose there. If I can at least get some grease into the freehub that should help.
Thanks for the pointer on ‘h f H’, could not work out what it might been despite the obvious answer :D.
