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Interested in upgrading some components on my Co-op Cycles DRT 1.1.

Hi, good afternoon, I have a question, I bought a co op drt 1.1 bike and I would like to change the gears to 9 or 12 speeds but I don't know which groupset I should buy someone who can help me

7 Replies

@Eric84 Thanks for reaching out!

Any time you're looking to change out your components like this we recommend speaking with a bike technician your local REI bike shop. It is possible to replace your gears, however, you will likely need to replace your shifters, crankset, and derailleurs as well. That can be quite the project! 

Here are some of the specs on this year's model of DRT 1.1:

Front Derailleur - Shimano Altus

Rear Derailleur - Shimano Acera

Rear Cogs - Shimano HG31, 11, 34, 8-speed

Crankset - Shimano TY 501, 42-34-24

Shifters - Shimano Altus


@TomV Do you have any insight to share here?

Hopefully this helps, thanks!


At REI, we believe time outside is fundamental to a life well lived.

There's obviously going to be some preference here for brand (i.e. Shimano vs. SRAM) and how much you're looking to spend.

Personally, I'd think this is a great opportunity to go up to 12 speeds and ditch the front gearing to go to a 1x system, freeing up the other side of the bars for a dropper post lever 😏. Going SRAM Eagle NX like is a great bang for your buck I think and includes the whole package of shifters/cogs/cranks/derailleur, although you'd have to confirm if you'd need the "boost" version which is linked, or "non-boost", which is basically the width of the frame's rear dropouts where the wheel axle bolts in. @REI-JohnJ could maybe get the REI elves working to find that out for you, I can't find a product page for the DRT 1.1 maybe because it's not in stock atm.

Part of what I like about the Eagle system is you can mix and match all their tiers for the most part, so you could run a GX derailleur but an NX cassette with a fancier X01 or XX1 shifter and a GX chain, which makes it super easy to maybe start with the cheaper ones and upgrade over time. Crucially, you'd want NX for the cassette since it would work with your Shimano HG freehub body: GX and above requires SRAM's XD freehub to be able to fit the smallest 10 tooth cog, while NX stops at 11 teeth to be compatible with the old standard. The hierarchy from low to high is SX, NX, GX, X01, XX1, but SX isn't really available to buy as parts, it's mostly for manufacturers. In fact I myself just recently bought a fat bike with SX components stock (because SX is what came with the color I really wanted...) and am working on upgrading it to GX and X01 parts. 

The cranks can throw a bit of a wrench in the works so to speak. The Shimano Tourney that's stock you could maybe leave on if you wanted to buy the individual components instead of the whole groupset package, but the chainrings may be riveted on and nonremovable leaving you without the narrow-wide tooth profile that helps with chain retention on 1x systems, and two unused chainrings which are dead weight (though I suppose the big one could function as a bash guard...). The chainring(s) will wear out eventually so I would probably recommend including new cranks as part of the groupset to have that ability to replace worn chainrings, but regardless of if you go SRAM Eagle or another brand, your current bottom bracket is almost surely a cartridge square taper design, so you'll probably need a new BB to go with the groupset (The SRAM Eagle system uses their DUB standard, which isn't bad at $38).

All that said, I've also heard good things about Box Component's drivetrains as a new competitor against the Big Two (Shimano/SRAM), which come in 9 and 11 speed variants, but I don't have any personal experience with them.

Hope that helps and good riding!

Superusers do not speak on behalf of REI and may have received
one or more gifts or other benefits from the co-op.

Be wary of this advice. I bought a DRT 1.1 in the summer of 2020 and it does not match the specs described here. The current iteration(the one I own) of DRT 1.1 uses a 7 x 3 drivetrain. The rear axle is NOT compatible with SRAM's Eagle NX 12 speed cassette. The hub is too short to accommodate the cassette. 

Its too bad REI does not have a way to easily differentiate or make known the differences between their own models even within the same version.  



You are correct, thanks for pointing this out! We released an updated version of the Co-op Cycles DRT 1.1 bike during 2020 and the that version has a 3 x 7 drivetrain. In our initial response, we were referencing the prior model, which was also available to purchase for parts of 2020. Here is the info, updated for the current model of the DRT 1.1:

Front Derailleur - Shimano Tourney

Rear Derailleur - Shimano Tourney

Rear Cogs - Shimano 12-32, 7 speed

Crankset - Shimano Tourney 42-34-24

Shifters - Shimano Rapidfire plus

As we stated in our original response, we encourage you to reach out to your local REI bike shop to discuss changes of this order on your bike. This bike does not have boost spacing in the hubs, so you'll want to bear that in mind as you think about replacement parts for the drivetrain. Additionally, the techs at the bike shop will be able to give you a better idea of what the timeline is if you need to order parts, which may be significant given supply chain issues at this time.

We also appreciate the feedback regarding the components on different models of our bikes. We will be sure to pass it along.

Hopefully this helps, thanks!


At REI, we believe time outside is fundamental to a life well lived.

I have the same bike, and after 6 months the 4th gear starts to slip (so I switch to 3rd) and 3 months later the third gear also slips. I took it in to see what can be done, and they said they adjusted it, but still it has the issue. I even showed the techs where the rear cog on 4th gear has different wear on different parts (some are looking elongated out). My daily ride is 2 km, down and up the hill, 1km long and 120 meter rise, so not difficult. Is this a wear item or should it last more 200 miles?  Is this an easy thing to replace?


I visited my local REI and asked about replacing the 3x7 to a 1x11 or similar. Well, bad news, folks: the upgrade is gonna cost around $600 and involves a new wheel and rebleeding of the brakes among other parts and works. I'm definitely not a bike upgrade pro and may have not asked all the questions and/or understood everything and there MAY be some other options - but for me it's a no go. Wish I knew that before I bought the bike.


For the most part that sounds right. As @REI-JohnJ noted my previous advice was based on the 8-speed drivetrain of last year's spec. 7 speed gears often use a different interface to the hub or the hub body is too short for more gears, which is where a new wheel comes in. The one thing that throws me though is I don't see why a brake bleed would be needed, that should be completely unconnected to the gearing system.

I'll note this isn't unique to REI's bikes: entry level bikes often sacrifice upgradability. This is all true of the 2021 Trek Marlin 5s we sell at the shop I work at as well.

Superusers do not speak on behalf of REI and may have received
one or more gifts or other benefits from the co-op.