When you're rebuilding a bike or planning a drivetrain, the hardest part isn't the wrenching-it's choosing which kit to buy. Do you need a full drivetrain with shifters and derailleurs, a groupset with a wide cassette, or just dependable brakes? This comparison works through four distinct options for bicycle drivetrain brakes, from a budget brake set to a wide-range groupset, so you can match the parts to the riding you actually do.
Quick take
Here are the four candidates, spanning a complete drivetrain bundle, a brake set, and two groupsets. The table below shows listed prices side by side, and the product notes explain what each kit does and where it falls short.
Listed price comparison
| Product | Listed price | Price bar | What you get |
|---|---|---|---|
| Shimano Altus, SunRace, KMC Z Drivetrain Kit Mountain 6 Groupset 11-36 9-speed | USD 89.97 | 9-speed mountain drivetrain kit with shifters, front/rear derailleurs, cassette, chain | |
| Campagnolo Ekar Groupset 1 x 13 Speed Gravel Bike 172.5 mm 40T 9-42 Cassette | USD 589.00 | 1x13 gravel groupset with crank, cassette, shifters, derailleurs (no chain) | |
| SHIMANO Altus BR-BL-M315 MT200 Hydraulic Disc Brake Set Bicycle MTB F&R OE | USD 61.48 | front/rear hydraulic disc brake set, pre-filled, levers and calipers | |
| New Shimano Deore M4100 10 Speed Drivetrain Groupset 42T 46T MTB (OE | USD 124.88 | 10-speed right shifter, rear derailleur, cassette, chain |
Decision matrix
- If you only need to sort out stopping: The Shimano Altus M315/MT200 brake set is the focused, lower-priced path.
- If you're replacing multiple shifting parts: The Altus/SunRace/KMC Z kit bundles everything into one order.
- If you're simplifying to a one-by setup: The Deore M4100 kit gives you a rear-shifting groupset without front shifting duties.
- If you're starting a build from a groupset: The Campagnolo Ekar groupset is the broad-ranging option with the biggest price tag here.
Product notes
Shimano Altus, SunRace, KMC Z Drivetrain Kit Mountain 6 Groupset 11-36 9-speed
This kit gives you a full 9-speed drivetrain in one order: Altus RD-M2000 long-cage rear derailleur, Alivio FD-M3120 front derailleur, SunRace cassette, KMC chain, and shifters. The 11-36 cassette supplies a wide range for climbing, and the long cage is designed to handle that capacity. At USD 89.97, it's a practical route when you're replacing several worn parts at once. The limitation is that it's a two-by setup with a front derailleur, so if you want the simplicity of a single-shifter cockpit, this kit won't give it to you. It includes a front derailleur and left shifter, so plan the handlebar layout accordingly.
Campagnolo Ekar Groupset 1 x 13 Speed Gravel Bike 172.5 mm 40T 9-42 Cassette
The Ekar groupset is a broad-ranging option for a single-chainring build: a 13-speed cassette spanning 9-42, a 172.5 mm crank, and a 40T chainring. The groupset comes complete as shown, though the chain is not included, so that's an extra cost on top of the USD 589.00 price. This is also the most expensive kit in this group by a wide margin, which makes it a choice for a dedicated build rather than a casual upgrade. It's aimed at riders who want one shifting system for varied terrain.
SHIMANO Altus BR-BL-M315 MT200 Hydraulic Disc Brake Set Bicycle MTB F&R OE
If you need dependable stopping power without rebuilding the drivetrain, this Shimano hydraulic set for USD 61.48 is the focused pick. It includes the BL-MT200 three-finger levers, SM-BH59 hoses, BR-MT200 two-piston calipers, and the brake system arrives pre-filled and bled. The front hose is 750mm and the rear is 1300mm. One limitation to keep in mind: the base set does not include rotors, though a 160mm rotor option is available. Depending on your frame and fork mounts, you may also need a separate post mount or IS adapter to fit the calipers.
New Shimano Deore M4100 10 Speed Drivetrain Groupset 42T 46T MTB (OE
The Deore M4100 kit is built around a 10-speed right shifter with RAPIDFIRE PLUS and 2-WAY RELEASE, paired with a matching cassette and chain. You can choose a 42T or 46T cassette, which gives you a meaningful range choice for hilly trails. The I-SpecEV shifter mounting design helps keep the handlebar area tidy. At USD 124.88, it's a middle-priced option that upgrades a bike to 10-speed without adding a front shifter. Just note that the set is a rear-shifting package, with a right shifter, cassette, and chain, so it suits a one-by setup.
Final recommendation by use case
- If you're replacing brakes without touching the drivetrain: Choose the Shimano Altus M315/MT200 brake set.
- If you're rebuilding a drivetrain from shifters to cassette: Choose the Altus/SunRace/KMC Z kit.
- If you're upgrading your shifting: Choose the Deore M4100 groupset.
- If you're building a bike from a groupset: Choose the Campagnolo Ekar groupset.
