1980s Dave Yates Road Bike - Wheel Conundrum

[Gtpulse]

My first thoughts were just make 130mm fit but you’ve got a lovely bike there and the full 7400 group bar the wheels so think you should go for the right stuff. A quick search and there is a set I think with an HG freehub on it sure others will confirm. On velobase it says the 7400 HG hubs had tapered locknuts to allow the 130mm hub to fit 126mm spacing - in quoting internet stuff here so would rely on others confirming!

https://www.ebay.co.uk/itm/20502780...jBPcoA6Tqi&var=&widget_ver=artemis&media=COPY

 

[bikeworkshop]

Either use a 126 or pay a professional to rejig the dropouts to 130 - they need to be parallel too.

I've seen plenty of nice old bikes with broken dropouts after years of use with the wrong hub - and repaired quite a few of them, but you've bought a quality piece, so do it properly.

 

[motor84]

locknuts

My first thoughts were just make 130mm fit but you’ve got a lovely bike there and the full 7400 group bar the wheels so think you should go for the right stuff. A quick search and there is a set I think with an HG freehub on it sure others will confirm. On velobase it says the 7400 HG hubs had tapered locknuts to allow the 130mm hub to fit 126mm spacing - in quoting internet stuff here so would rely on others confirming!

https://www.ebay.co.uk/itm/20502780...jBPcoA6Tqi&var=&widget_ver=artemis&media=COPY

View attachment 899716

Yes, watching those on EBay. I might go for them. I think they must be the 130/126mm as it’s Dura Ace, 7400. That would be the perfect solution.

 

[ChromeChainstay]

Dura Ace freehub ID 7400 7402 7403 101​

blast from the past •

This is brought up fairly frequently so I thought I'd throw something together. Shimano offered 3 different version of the 740X series freehubs, 7400, 7402 and 7403. There is NO 7401 hub. First lets clarify some terminolgy in 'Jim Speak' which is valid for the purposes of this thread only.

Freehub: Ratcheting mechanism is built into hub.
Cassette: Group of sprockets that slide onto freehub
Uni-glide cassette: group of sprockets with 1 threaded sprocket that holds it all on
Hyperglide cassette: group of sprockets that uses an inner lockring to hold it all on. All Hyperglide hubs have FULL LENGTH splines. Important!!!
Locknut: nut that holds axle parts tightly together
126mm: flat lock nut
130mm: mushroom locknut
6-speed: flat locknut
7-speed: flat locknut
8-speed: mushroom locknut

FH-7400: Uniglide only. 126mm spacing only. Available in both 6 or 7 speed versions. The freehub itself is identicle with the only difference being a difference in cassette spacing and number of cogs. Shimano labled these as FH-7400-6/7. From what I've been able to tell you could order a FH-7400-6 hubset that came with a 6-speed cassette or a FH-7400-7 that came with a 7-speed cassette.

FH-7402: Uniglide only. 130mm spacing. A very similar hub to the FH-7400, its just a little wider to fit 8-speeds

FH-7403: Both Uniglide and Hyperglide. 130mm spacing. Although this hub is Uni-Glide I dont believe its 1st and 2nd cog interchange with the 7400 or 7402 hubs due to difference in threaded area diameters.

So...here we go. First up is the FH-7400. Visual cues are the flat locknut which means 6/7 speed and the external threading which is a Uni-Glide feature. Notice that the splines are NOT full length. This NOT a Hyperglide hub!!!

Next up we have the FH-7402. Visual cues are the mushroom locknut which means 8-speed and the external threading which in a Uni-Glide feature. Notice that the splines are NOT full length. This is NOT a HyperGlide hub!!!

Last in the lineup is the versatle FH-7403. Visual cues are the mushroom locknut which means 8-speed and the full length splines which is a HyperGlide feature. External threading is a UniGlide feature. The FH-7403 is both a UniGlide and HyperGlide hub.

 

[motor84]

Dura Ace freehub ID 7400 7402 7403 101​

blast from the past •

This is brought up fairly frequently so I thought I'd throw something together. Shimano offered 3 different version of the 740X series freehubs, 7400, 7402 and 7403. There is NO 7401 hub. First lets clarify some terminolgy in 'Jim Speak' which is valid for the purposes of this thread only.

Freehub: Ratcheting mechanism is built into hub.
Cassette: Group of sprockets that slide onto freehub
Uni-glide cassette: group of sprockets with 1 threaded sprocket that holds it all on
Hyperglide cassette: group of sprockets that uses an inner lockring to hold it all on. All Hyperglide hubs have FULL LENGTH splines. Important!!!
Locknut: nut that holds axle parts tightly together
126mm: flat lock nut
130mm: mushroom locknut
6-speed: flat locknut
7-speed: flat locknut
8-speed: mushroom locknut

FH-7400: Uniglide only. 126mm spacing only. Available in both 6 or 7 speed versions. The freehub itself is identicle with the only difference being a difference in cassette spacing and number of cogs. Shimano labled these as FH-7400-6/7. From what I've been able to tell you could order a FH-7400-6 hubset that came with a 6-speed cassette or a FH-7400-7 that came with a 7-speed cassette.

FH-7402: Uniglide only. 130mm spacing. A very similar hub to the FH-7400, its just a little wider to fit 8-speeds

FH-7403: Both Uniglide and Hyperglide. 130mm spacing. Although this hub is Uni-Glide I dont believe its 1st and 2nd cog interchange with the 7400 or 7402 hubs due to difference in threaded area diameters.

So...here we go. First up is the FH-7400. Visual cues are the flat locknut which means 6/7 speed and the external threading which is a Uni-Glide feature. Notice that the splines are NOT full length. This NOT a Hyperglide hub!!!

Next up we have the FH-7402. Visual cues are the mushroom locknut which means 8-speed and the external threading which in a Uni-Glide feature. Notice that the splines are NOT full length. This is NOT a HyperGlide hub!!!

Last in the lineup is the versatle FH-7403. Visual cues are the mushroom locknut which means 8-speed and the full length splines which is a HyperGlide feature. External threading is a UniGlide feature. The FH-7403 is both a UniGlide and HyperGlide hub.

Amazing! Thanks @ChromeChainstay Apologies if that info is already on here. I did a quick search but didn't find it. I have asked the seller of those wheels on ebay which hub it is. Now purchased those. I will update here!

 

[motor84]

Bought those wheels. They fit perfectly! Thanks to the FH-7403 hub that fits both 126 and 130mm.

I now need to get a rear cluster. The hub seems to be 8 speed, but will my older 126mm frame have the clearance? Should I go 7 speed to be sure?

Thanks to @ChromeChainstay 's guide, pretty sure I have the FH-7403 which means I can fit a Hyperglide?

So this should fit: Ebay Link

The ratios are so close on these old blocks. Any wisdom regarding getting anything over a 25t for climbing?

 

[wiredfool]

There are 28t cogs out there -- this is what I have on my DA uniglide hub. (Not NOS, Knackered old stock is probably more like it. It was second hand used and came with a cross bike.)

 

[motor84]

Thanks @wiredfool

I wonder if finding an actual Dura Ace Uniglide hub with over 25T might be tricky.

I'm now wondering if I should go for Uniglide or Hyperglide. Lots of Hyperglide cassettes on Ebay for £20-30. But I assume I would need to then always run a HG chain as well? Any issues with that and older DA front chainrings?