Sturmey Archer S80

[fokof]

8 speed internal hub , disk brake compatible.
http://www.sturmey-archer.com/hubs_8spd_XRK8.php

Anybody rode on of these ?
Good or bad ?

Already have a Nexus and a Rohloff , want to have a little feedback before taking the plunge on this one....;)

[rockyrider]

Whoa, Sturmey-Archer... a blast from the 3 speed past.

It is hefty, 1500gms is most of the way to the weight of a Rohloff. Chainline of 45mm makes it a bit fiddly for lining up a mountain crankset, although it matches their cranks perfectly. About the same gear range as the SRAM S7 hub at 305%. Interesting to see if anyone has ridden them. It'd be interesting to know what the torque multiplication limits are compared to the Rohloff.

[Trailer Rails]

I'll sell you one cheep. We got it for a 29er project and it is geared too high. It is better suited for a commuter bike. It is laced up to a salsa 29er rim right now.

[tryandgetme]

how tough are they? how easily would a singlespeeder strip one out mashing up a hill?

[fokof]

It is hefty, 1500gms is most of the way to the weight of a Rohloff. Chainline of 45mm makes it a bit fiddly for lining up a mountain crankset, although it matches their cranks perfectly. About the same gear range as the SRAM S7 hub at 305%. Interesting to see if anyone has ridden them. It'd be interesting to know what the torque multiplication limits are compared to the Rohloff.

The nuxus is 1750g
The Speedhub (DB) is 1850g
It's the lightest of the three.
My 4 single plate/cog bikes are with a 47mm chain line , I don't think that 45mm is strange. What do you mean?

I'll sell you one cheep. We got it for a 29er project and it is geared too high. It is better suited for a commuter bike. It is laced up to a salsa 29er rim right now.

You rode it a bit , your thoughts ?
Shifting , noise ....

[tryandgetme]

You rode it a bit , your thoughts ?
Shifting , noise ....

busting knees on handlebars?

[fokof]

The 1/1 ratio gear is the smallest , it comes with either 23 or 25 cog , if you put a 22 chainring , that's 0.88 (1st) to 2.68 (8th) , hummm :confused:

Do I get it the wrong way ?

[Trailer Rails]

It shifted Ok, there was no skipping in the hub. The problem we had was that in order to get a decent offroad gear ratio we installed a 22t chainring. With that type of torque the hub axle would rotate in the dropouts. The in turn would pull on the shift cable and cause the shifting to go wonkey. If you were running a larger chainring like a 34-40t then you would have no problems with the axle rotating.

[rockyrider]

It has axle flats, can you use the same sort of indexed washer that Shimano uses on the Nexus 3 speed hubs to keep the axle from rotating?

[tryandgetme]

huh. I think it's time to get me one. I've got miles of horizontal dropouts on my Mia, I'll figure something out.

[rockyrider]

My 4 single plate/cog bikes are with a 47mm chain line , I don't think that 45mm is strange. What do you mean?It just means having to fiddle with the BB position (toss e-mount der spacer?) or chainring spacers to move the chainring in the extra 2.5mm from the typical 47.5mm MTB middle ring.

[Trailer Rails]

It has axle flats, can you use the same sort of indexed washer that Shimano uses on the Nexus 3 speed hubs to keep the axle from rotating?


Yes it does have axle flats but the torque with such a low chainring was too much and it would break the washers holding the axle. My next step was to try and modify some open ended whenches to hold the axle. All the washers we were using were mild steel and they would deform or break.

[fokof]

So no trails for that baby .......

Thanx

[SynicGeek]

A buddy of mine works at QBP in the wheel dept. He's seen "quite a few" come back with issues. It's not an off road hub, it's a chinese hub ment for "normal" street riders.
I'm rather interested in the new Sram nine speed disc hub.
-FBS