Originally Posted by
repechage
getting a 7 block into and onto a 120mm paced hub, assuming as original, might appear to fit, but the chain may never make it up past the seat stay.
120 to 126 was the change of skewer axle, longer hub axle and the mentioned doublegrove spacer, while the hub shell basically stayed the same, I felt the hubs with the imprinted text advising the threading vs, groove, no groove were 1mm different. Later hubs and lock nuts are also a bit different, and are not directly interchangeable without checking the working dimensions, they will work, but test first. I have almost always found an 7 block, needs 127+ mm, I have removed the off freewheel washer between the locknut and cone to get the numbers (as seen on earlier hubs) but dish suffers, some rims such as Rigida just are not good for this build, the holes are just too inline, no stagger.
That's what I thought too. Which was part of why I thought I was losing my mind. Tape measure and my eye was telling me one thing, everything I thought I knew about freewheel spacing was telling me another. True it was darn close to hitting, more so than my 126mm hub, but I saw daylight from every angle.
Originally Posted by
Road Fan
I went through this on my Woodrup build, to use a Sachs-Maillard 7-speed. I ended up with an OLD of 128 mm on the hub, with some frame stretch. Seems the clearances on the inner faces of different dropouts are not the same. I found a messy old LBS that had a bin of axles and spacers, and I pawed through them until I had an assortment, then drew my credit card and fired. I should have taken photos, but sorry!
Road Fan
No worries, I'll be heading to the local shop once they open at noon. Hopefully one of the older guys are at the repair desk when I roll in. I'll just take the hub, my axle, etc up there and figure out what I need. Guess mostly I just need the same amount of spacing on the drive side as my other 126mm hub, so that the derailleur stops are in the same place making it possible to swap wheels back and forth without fear of over shifting.
Originally Posted by
sirpoopalot
buy (2) 3 mm spacers from lbs.
mines sells they fro $.75 each
they look like thick aluminum washers.
remove 1 cone nut (any side)
slide spacer on until flush with cone.
reinstall cone.
repeat for the other side.
really, this isn't hard.
Don't you mean lock nut? If I remove the cone, put spacer in, replace cone, that would put spacer, not cone, against the bearings. But I get what you meant. You're saying that I want to increase spacing 3mm on each side.
I've always got to do things the hard way.