New Spectro S7 vs. Old S7

[meb]

New Spectro S7 vs. Old Spectro S7

I see SRAM shows the new ratio-range of 303% top to bottom on the new internal gear hub.

What changes besides ratios have been made between the new vs. old SRAM S7 internal gear hub( i.e. weight/efficiency/reliability/shifting/impact resistance)?

Are these new hubs available yet, and are most dealership's inventory the old S7 or new S7 at present?

 

[Sheldon Brown]

meb wrote:

> New Spectro S7 vs. Old Spectro S7
>
> I see SRAM shows the new ratio-range of 303% top to bottom on the new
> internal gear hub.

My internal-hub gear calculator will run gear calcs on both versions,
among others:

http://sheldonbrown.com/gears/internal.html

> What changes besides ratios have been made between the new vs. old SRAM
> S7 internal gear hub( i.e. weight/efficiency/reliability/shifting/impact
> resistance)?

The new model is supposed to be more durable.

> Are these new hubs available yet, and are most dealership's inventory
> the old S7 or new S7 at present?

This changed happened a couple of years ago at least, everything you'll
find in the pipeline will be new spec. Also, if it's designated
"Spectro" it's new type.

See: http://sheldonbrown.com/harris/hubs-internal.html

Sheldon "Epicyclic" Brown
+-------------------------------------+
| One can never know what is enough |
| until one knows what is too much. |
| --William Blake |
+-------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

 

[Dan Burkhart]

meb wrote:

> New Spectro S7 vs. Old Spectro S7
>
> I see SRAM shows the new ratio-range of 303% top to bottom on the new
> internal gear hub.

My internal-hub gear calculator will run gear calcs on both versions,
among others:

http://sheldonbrown.com/gears/internal.html

> What changes besides ratios have been made between the new vs. old SRAM
> S7 internal gear hub( i.e. weight/efficiency/reliability/shifting/impact
> resistance)?

The new model is supposed to be more durable.

> Are these new hubs available yet, and are most dealership's inventory
> the old S7 or new S7 at present?

This changed happened a couple of years ago at least, everything you'll
find in the pipeline will be new spec. Also, if it's designated
"Spectro" it's new type.

See: http://sheldonbrown.com/harris/hubs-internal.html

Sheldon "Epicyclic" Brown
+-------------------------------------+
| One can never know what is enough |
| until one knows what is too much. |
| --William Blake |
+-------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

Sheldon
Is there a difference between the old S7 and the older still Sachs Super 7 it replaced? I have one of these with the cable actuated drum brake.
If the new version is an improvement it must be really something because mine seems to be bomb proof.