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I have a 2nd hand freehub that came in a bag labelled hope Pro 4. How can I confirm that it is in fact a pro 4? The rubber sealing ring is green whereas it appears to be black on the 2 and 3. There are no markings anywhere apart from on the bearings.
Any ideas?
The pro 4 is a larger diameter at the pawl end. If it looks like the seal can slip off either side of the freehub it's a pro 2, if it will only go one way (over the splines) it's a pro 4.
Aren't the bearings different sizes?
Yes, if you can see the size of the inner bearing, pro4 uses a 17287 where's the pro2 evo uses a 6803.
Also if you look down the hole for the axle, the pro4 just has a bearing at each end and single spacer, whereas the pro2 has 2 spacers and an intermediate bearing.
Ace. Thanks Dave, it is a pro 4.
What would be a reasonable price to sell 2nd hand? Some wear on the splines, marking from a cassette... £40?