Choosing bicycle drivetrain brakes is rarely one decision. You could be finishing a road bike, refreshing worn shift levers, or outfitting a gravel or mountain bike without spending a fortune. The four options here span a complete 10-speed road groupset, a carbon brake-shift lever set, a 1x13 gravel groupset, and a 9-speed mountain drivetrain kit.
Quick take
Prices span $89.97 to $589, and the bigger difference is scope. The Campagnolo Centaur kit is a full 10-speed road groupset with 53/39 chainrings and a 12-27 cassette. The SRAM Rival set covers only the brake-shift levers. The Campagnolo Ekar is a 1x13 gravel package. The Shimano Altus/SunRace/KMC kit is a six-piece mountain drivetrain bundle built around an 11-36 cassette.
Price comparison
| Product | Price | Bar |
|---|---|---|
| Campagnolo Centaur 10-speed Road Groupset | $350.96 | |
| SRAM Rival 2x10 Carbon Brake Shift Levers | $149.00 | |
| Campagnolo Ekar 1x13 Gravel Groupset | $589.00 | |
| Shimano Altus/SunRace/KMC 9-speed Mountain Kit | $89.97 |
Decision matrix
| Build type | Best match | Why |
|---|---|---|
| Complete 10-speed road or cyclocross/gravel | Campagnolo Centaur | One groupset package with crankset, derailleurs, shifters, and more, in used but low-wear condition |
| SRAM 10-speed road lever replacement | SRAM Rival | Carbon DoubleTap levers with front and rear controls for a 2x setup |
| 1x13 gravel build | Campagnolo Ekar | Wide 9-42 cassette and no front derailleur for gravel climbing |
| 2x9 mountain drivetrain | Shimano Altus/SunRace/KMC | Six-piece kit with shifters, derailleurs, cassette, and chain |
Product notes
Campagnolo Centaur Black 10-Speed Road Bike Groupset 175mm 53/39 12-27 Build Kit
This used build kit is the most complete road option in the group. It pairs 175mm cranks with 53/39 chainrings and a 12-27 cassette, so you get a traditional 10-speed road spread for tarmac or flat-to-rolling loops. The front derailleur uses a 34.9mm clamp mount, which is useful if you are mounting it to a standard round seat tube. The condition is listed as used with minimal wear, and the cluster, chain, and rings are said to still have substantial life left. That said, it is not new, and 175mm crank arms are a fixed length, so check that they fit your riding position before committing.
SRAM Rival 2x10 Speed Carbon DoubleTap Brake Shift Lever Set Road Bike
If your road bike already has SRAM 10-speed Exact Actuation derailleurs and mechanical rim brakes, this lever set is the focused fix. The two levers use DoubleTap shifting-the left one handles the front derailleur for a 2x setup, and the right one runs the rear 10-speed derailleur. Carbon brake levers keep the weight down, and the set includes both front and rear controls. It's the only product here that covers just the lever portion of a drivetrain, so it won't get a bike moving by itself. The used condition also means you need to inspect the pivot and shift mechanism closely before installing. If your bike uses a different brake type or drivetrain generation, this set is not the right match.
Campagnolo Ekar Groupset 1 x 13 Speed Gravel Bike 172.5 mm 40T 9-42 Cassette
For a gravel bike that needs wide-range 1x shifting, this Ekar groupset is a strong choice. It uses a 172.5mm crankset with a 40T chainring and a 9-42 cassette, so you get 13 gears with no front derailleur. The condition is new other, and the components are OEM. One clear limitation is that the chain is not included, so you'll need to add a chain to your purchase. The 172.5mm crank length is also fixed, which matters for riders who prefer shorter or longer cranks. For someone building a gravel bike from parts, this is the only 1x13 package in this group.
Shimano Altus, SunRace, KMC Z Drivetrain Kit Mountain 6 Groupset 11-36 9-speed
This mountain kit pulls together parts from a new, never-assembled Mongoose TYAX Sport mountain bike, so it is a six-piece package rather than a pick-and-choose lineup. The contents include a Shimano Altus RD-M2000 9-speed rear derailleur, a Shimano Alivio FD-M3120 front derailleur with an E-type mount, a SunRace 11-36 cassette, a KMC Z chain, and shifters. That makes it a practical starting point for a 2x9 mountain build or a replacement set for a similar bike. The trade-off is that the E-type front derailleur needs a frame with the matching bracket, and the parts are pulled from a factory-built mountain bike rather than a performance kit. At the low end of the price spread, it leaves room for other components.
Final recommendation by use case
If you're completing a road or cyclocross/gravel bike and want one used groupset to complete the build, the Campagnolo Centaur build kit is the most complete choice. If you already have the rest of a SRAM 10-speed road drivetrain, the SRAM Rival lever set is the targeted way to replace or upgrade your controls. For a gravel bike that needs wide 1x range, the Campagnolo Ekar groupset offers 13 speeds, but plan for a new chain. And for a mountain bike, the Shimano Altus/SunRace/KMC kit delivers a six-piece 9-speed drivetrain at the bottom of the price range.
