SA 4 speed hub

[ConnoisseurEquator]

Hi
Is it possible to use a SA 4 speed hub with a 3 speed shifter? That until I find a 4.
Thanks

 

[classic33]

Hi
Is it possible to use a SA 4 speed hub with a 3 speed shifter? That until I find a 4.
Thanks

I'd say No. Second on a three speed hub is direct drive, with correct adjustment for selection of first and third either side.

There is this one
https://www.ebay.co.uk/itm/185010862624?hash=item2b1381ba20:g:L0QAAOSwWdZhIfVS

 

[raleighnut]

Nope the pull on the toggle chain is different

 

[raleighnut]

you can get new uns

https://www.sturmey-archer.com/en/products/detail/sls40

 

[biggs682]

My old Raleigh has a 4 speed trigger on a 3 speed hub

 

[Chris S]

I've seen bikes with Sturmey Archer 3-speed hubs and friction shifters. You could do the same with a 4-speed.

 

[Tenkaykev]

My old Raleigh has a 4 speed trigger on a 3 speed hub

Was the fourth speed labelled “ Turbo “ in red lettering? 😁

 

[biggs682]

Was the fourth speed labelled “ Turbo “ in red lettering? 😁

No it was labelled as for emergency use only

 

[Chris S]

My old Raleigh has a 4 speed trigger on a 3 speed hub

Which gear position was redundant , 1st or 4th?

 

[biggs682]

Which gear position was redundant , 1st or 4th?

4th

 

[mjr]

If anyone has the cable pulls for a SA 4 (FW?) shifter, could you send it to https://www.sheldonbrown.com/cribsheet-IG-cable-pull.html to help complete the tables, please?

 

[mjr]

I'd say No. Second on a three speed hub is direct drive, with correct adjustment for selection of first and third either side.

That's almost correct: second is direct drive but with correct adjustment so the shoulder of the shift rod is level with the axle end, then first is 4.7mm tighter, and third is 9.5mm looser on the shifter but basically slack cable. As long as the second-to-first pull is near enough, any shifter that slackens far enough will select third. In theory, a SRAM 7-speed indexed shifter will do it (pulling 4.5mm each click), with 3 or 4 positions at one end unused, but who knows why anyone ever would! I don't know what the pulls are on SA 4-speed shifters.

 

[classic33]

That's almost correct: second is direct drive but with correct adjustment so the shoulder of the shift rod is level with the axle end, then first is 4.7mm tighter, and third is 9.5mm looser on the shifter but basically slack cable. As long as the second-to-first pull is near enough, any shifter that slackens far enough will select third. In theory, a SRAM 7-speed indexed shifter will do it (pulling 4.5mm each click), with 3 or 4 positions at one end unused, but who knows why anyone ever would! I don't know what the pulls are on SA 4-speed shifters.

Slaken too much, you'll not take up that slack to get first and second.