The parts catalog
Every major e-bike part — and where to buy it.
36 core e-bike components from the manufacturers that actually matter — Bafang, Shimano, SRAM, Magura, Tektro, Schwalbe, Grin, and more. For each part you get a plain-English buying guide plus at least two suppliers: an Affordable pick and a Quality pick.
No brand paid for a spot on this list. No affiliate-first rankings. We list the parts we'd actually fit to our own bikes.
Motors
Bafang BBSHD 1000W Mid-Drive Kit
The legendary do-anything mid-drive. 1000W, 160 Nm, and a bottomless aftermarket make the BBSHD the conversion motor every builder eventually lands on.
Bafang BBS02B 750W Mid-Drive Kit
The value mid-drive that started the DIY revolution. 750W of geared climbing power for hundreds less than the BBSHD — perfect for commuters and lighter builds.
Bafang M620 "Ultra" Mid-Drive
The torque-sensing monster behind most fat-tire moto builds. 160 Nm, a real torque sensor, and a fully integrated frame mount — this is the factory-grade Bafang.
Geared Rear Hub Motor (Bafang G-Series)
Quiet, light, and dead simple. A geared rear hub is the easiest motor to live with for flat-to-rolling commutes — no drivetrain wear, no shifting discipline required.
Tongsheng TSDZ2 Mid-Drive Kit
The budget mid-drive with a real torque sensor. The TSDZ2 reads how hard you pedal — not just that you're pedaling — so it feels natural and intuitive in a way most cheap kits never do.
Batteries
Hailong 48V Downtube Battery
The universal downtube pack. The Hailong ("Shark") case bolts to almost any frame and is the most common replacement battery on the market.
Reention Dorado In-Tube Battery
The semi-integrated pack used by Aventon, Ride1Up, and dozens of others. Slides into the downtube for a cleaner look than a bolt-on Shark case.
52V Shark Frame Battery
More voltage, more punch. A 52V Shark pack gives a 48V system noticeably stronger top-end and a flatter power curve under load — a popular upgrade for conversions.
Smart BMS (Battery Management System)
The brain that keeps a lithium pack safe. A quality BMS balances cells, prevents over-charge and over-discharge, and is the single most important safety component in any battery.
Chargers
Grin Satiator Programmable Charger
The charger that doubles your battery's lifespan. Program a charge ceiling (e.g. 80%) and the Satiator turns any pack into a longer-living one.
3A–5A Fast Charger
Cut charge time in half. A 4A–5A charger refills a typical pack in 2–3 hours instead of 5–6, ideal for mid-day top-ups and bigger batteries.
Standard 2A Smart Charger
The reliable everyday replacement. A genuine 2A smart charger is the gentlest on your cells and the right call for overnight, full charges.
Controllers
Bafang Replacement Controller
The most common e-bike brain. If your hub-motor bike has thrown an error or lost power, a matched Bafang controller is usually the fix.
KT Sine-Wave Controller
The tuner's favorite. KT controllers pair with KT displays for deep parameter control and famously smooth, quiet sine-wave power delivery.
Grin Phaserunner FOC Controller
Engineering-grade control in a tiny waterproof package. Field-oriented control gives silent, ultra-efficient power and works with almost any motor.
Displays
Bafang DPC18 Color Display
The upgrade display for BBS/Ultra builds. A bright color screen with full access to Bafang's parameter settings and USB charging for your phone.
EggRider X2 Bluetooth Display
A tiny display that puts tuning on your phone. The EggRider talks to Bafang and KT systems over Bluetooth, with a slick app for settings, speed limits, and data.
KT-LCD8H Display
The affordable, deeply tunable display for KT-controller builds. Compact, weatherproof, and packed with adjustable parameters for the price of a tank of gas.
Grin Cycle Analyst V3
The data nerd's e-bike display and the gold standard for DIY builds. The Cycle Analyst shows everything — volts, amps, watts, amp-hours used, range — and can actively limit speed and current to protect your system.
Drivetrain
KMC e-Bike Chain (e-Sprox / e11)
A chain built for motor torque. KMC's e-bike chains use hardened plates and pins to survive the loads a mid-drive throws at them — the cheapest insurance your drivetrain has.
Shimano CUES Drivetrain Group
Shimano's tough, simplified group built with e-bikes in mind. Wide-range gearing and Linkglide durability that's rated to last far longer under motor power.
SRAM EX1 E-Bike Groupset
The purpose-built e-MTB group. Just 8 big, burly gears designed to take full mid-drive torque and shift cleanly under power.
Steel Mid-Drive Chainring
Stop shredding alloy. A steel (or hardened) chainring on a BBS/Ultra mid-drive lasts many times longer than the stock part and improves chainline.
Gates Carbon Drive CDX Belt
A belt instead of a chain: no grease, no rust, no stretch, and no oily marks on your trouser leg. For single-speed and internally-geared commuters, the Gates Carbon Drive is the ultimate low-maintenance upgrade.
Brakes
Tektro HD-E350 Hydraulic E-Bike Brakes
The workhorse e-bike brake. Hydraulic power with a built-in motor cutoff switch, found on countless factory bikes and a reliable, affordable upgrade.
Magura MT5e 4-Piston Brakes
Serious stopping for heavy, fast e-bikes. Four pistons, German hydraulics, and an e-bike cutoff — the brake for cargo bikes and high-power builds.
Shimano MT420 4-Piston Brakes
Four-piston Shimano power at a mid-tier price. Excellent modulation and bite, a favorite upgrade for e-MTBs and faster commuters.
Sintered (Metallic) Brake Pads
The right pad for a heavy, fast e-bike. Sintered metallic pads resist fade and last longer under the heat that e-bike weight and speed generate.
Tires & Wheels
Schwalbe Super Moto-X Tire
The default premium e-bike tire. Fast-rolling, grippy, and reinforced for e-bike loads and speeds — the tire on the GSD, HSD, and countless quality builds.
Kenda Juggernaut Fat Tire
The fat-tire standard. A 26×4" Juggernaut floats over sand and snow and is the most common replacement tread on fat e-bikes.
Tannus Armour Tire Insert
Near-bulletproof flat protection. A foam insert that lines your tire, runs with a tube, and lets you keep rolling even after a puncture.
Double-Wall E-Bike Wheelset
A wheel built to take the load. E-bike-rated double-wall rims with extra spokes and sealed hubs survive the weight, torque, and miles that crack budget wheels.
Suspension
SR Suntour E-Bike Suspension Fork
The most common suspension upgrade. SR Suntour's e-bike-rated forks (Mobie, XCM-E) add real travel and comfort to rigid commuters and budget bikes.
Cane Creek Thudbuster Suspension Seatpost
Instant comfort, no fork required. The Thudbuster's parallel-link design takes the sting out of bumps for any rigid commuter or cruiser.
Sensors & Controls
Pedal-Assist (PAS) Cadence Sensor
The part that tells your motor you're pedaling. A failed PAS sensor is a top cause of 'assist stopped working' — and it's a cheap, easy fix.
Thumb Throttle
On-demand power at your thumb. A clean replacement or upgrade for a worn throttle — and the most ergonomic throttle style for most riders.
Disclosure: We don't take payment for placement in this catalog, and we have no affiliate relationship with the suppliers linked above — they're plain links and we earn nothing if you buy through them. Always confirm fitment, voltage, and connectors for your specific bike before buying a part. Read our editorial standards or e-bike battery safety.