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SRAM Automatix 2 Speed Hub with Coaster Brake - 130mm - 36H

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Questions & Answers (4) Q & A
Auto shifting you can rely on

This one's a no-brainer. When riding in dense city traffic, you need to concentrate on the road, not on your shifters. With SRAM's Automatix two-speed hub, you can focus on your lane, and the hub will change gear automatically for you based on your speed. There's no shifter, because the centrifugal clutch chooses your gear automatically. It's a fantastic system for riding around town, with a minimum of terrain changes. If you're on hillier ground, check out the i-Motion 3 instead.

Automatix gets you where you're going, and the centrifugal clutch changes the pace along with you. It delivers automatic two-speed shifting, no shifter required.

SRAM Automatix eliminates the distractions for a ride that's safer, easier and more fun!

- Two-speed automatic gear hub
- Safe and stress-free system
- No shifter, no cables, no maintenance
- Gears: 2
- Transition: 136%
- Technology Highlights: Mechanical centrifugal clutch
- Weight: 980g
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Questions & Answers (4)
Actual Old
15 Mar 2017
I Read That The OLD is Actually 120 And That Spacers Make It Up To 130. As My Proposed Frame Is 110 Then This Would Require Less Stretching, Can You Confirm This Please, thanks

The OLD is indeed 120mm without the spacers fitted.

Any Parts Require For Surly Troll?
09 Aug 2016

I planing to install this hub on my surly troll.
Any parts require? Ex. Brake Arm / Brake Arms clip.


This hub is for a bike with an OLN dimension of 130mm between the dropouts, according to the Surly website the troll has an OLN of 135mm so unfortunately this hub will not fit & we cannot source this product with the 135mm measurement required. Regards
Is The Hub Shell Aluminium?
09 Jul 2016
I would like to remove the sram logo, and polish the hub.

These hubs have a steel shell.

Sram Automatix 2 Speed Hub With Coaster Brake 130 Oln -
28 May 2014
Hi, What size spokes would I need to fit this a 700c rim?

Also what would be the smallest sprocket that could fit this hub?
I was thinking maybe a 15.

The spoke length will vary depending on which rim it is you intend to use, there is a variation between where the nipples sit on most 700c rims. The smallest sprocket that this hub is designed to accept is a 16T.