Radavist Review of the OM-1

[Drew Fitchette]

Check it out..

https://theradavist.com/rivendell-silver-om-1-derailleur-review

- Drew in ATL

[Kim H.]

Given the tooth capacity of 36T with this OM-1 rear derailleur, has anyone experimented with a Wolf Tooth Road Link to expand the capacity of this rear derailleur?

Kim Hetzel just wondering. 

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[Joe Bernard]

Kim, I'm tempted to find out. I have two older Shimano RapidRise on other bikes with 34t cassettes and hoo boy I like that shifting. My Clem has a 13-40t 7-speed cluster friction-shifted, the OM-1 on a Road Link may do the trick 👍

Joe Bernard 

Clearlake CA 

[Ted Durant]

Has anyone verified that the OM-1 has a 1.72 cable actuation ratio, i.e. compatible with Shimano 6-10 speed (except certain Dura Ace)?

The documentation at one point said it's 9-speed compatible, but didn't say whose 9-speed or which particular version. 

Ted Durant

Milwaukee, WI USA

[Kim H.]

Hi Joe, 

I am anxious to know of your findings. Please proceed !

Kim Hetzel, who received a mighty fine custom decaleur in the mail today from very skilled individual out of Portland, Oregon. 

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[Patrick Moore]

Also, will it shift across 10 cogs (Shimano, in friction)? 11 cogs?

The highly favorable reviews make me want to buy one, even tho’ I’ve avoided reverse pull derailleurs up to this point.

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Patrick Moore

Alburquerque, Nuevo Mexico, Etats Unis d'Amerique, Orbis Terrarum

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[Joe Bernard]

It'll shift 9 and 8/9/10 cassettes occupy the same space so you should be good. 11 is no person's land, I doubt Riv even considered the possibility. 

[Joe Bernard]

Does anybody know when the next batch is in? I'm going to try it first without Road Link just to see what's possible, I have 11-36 and 13-40 7-speedwrs to mess with. I'll try it with a 7-speed indexed Shimano DX thumby to see if the derailer uses traditional Shimano pull ratio. 

[Patrick Moore]

Thanks. Of course, I should have remembered that 8 and 10 sp road cassettes are the same width.

I guess that if a DA 7402 rd will shift across 10 cogs, the much more modern OM-1 ought to be able to handle just 1 more cog.

We’ll see ….

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[Drew Fitchette]

Patrick - my Hunq has an OM-1 paired with a silver wide low crank and a 10 speed 11-36 cassette and works flawlessly with silver friction shifters. I’m using a 10 speed chain and a microshift sword front derailleur. 

- Drew in ATL

[Patrick Moore]

Excellent! Thanks, Drew.

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