Aventon Abound SR and Abound LR: parts and specs
Replacement parts and specs for the Aventon Abound SR and LR cargo bikes: 20 x 3.0 tires, Tektro HD-E3520 brakes with 180 and 203 mm rotors, 8-speed cassette, BC147 display, Shengyi 750 W motor, 36V 20Ah battery and 42V 4A charger.
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Tools
This page lists the common replacement parts for the Aventon Abound SR (compact) and Abound LR (long tail) cargo bikes. They share most parts; the chain length differs. Specs are for the stock bike as sold; check your own bike before you buy. Full specs are on the Abound SR page and the Abound LR page. Some parts are sold for the SR only, so confirm LR fit with Aventon. Aventon's parts pages often don't show a price until you pick your model, so where no price is given below, check the page or ask Aventon.
Photo needed: The Abound SR and Abound LR side by side, to show the different rear ends.. Add one
Electrical parts on this list must match this exact model, and they are fitted at the external plugs or by a pro. Never open the battery, controller, motor or display. For battery and charger trouble, start with battery won't charge and e-bike battery care.
Parts list
- Tire: 20 x 3.0 urban tire on the SR; Innova IA-2131 Urban 20x3.0 on the LR. Aventon's tire for the Abound SR and LR, SKU 19003-4100050, is $47.99 each, read Nov 9, 2026.
- Inner tube: Aventon's 20x3.0 inner tube, SKU 19003-4200050, fits the Abound SR and LR, $11.99, read Nov 9, 2026.
- Brake rotor: Tektro 180 mm 6-bolt front and 203 mm 6-bolt rear.
- Disc brake caliper: Tektro HD-E3520 hydraulic, front and rear. Aventon's Hydraulic Brake Complete Set comes as a rear set with e-cutoff for all Abound models, $53.99, read Nov 9, 2026.
- Chain: 8-speed, 122 links on the SR and 154 links on the LR. Aventon's 7/8 Speed Chain comes in a 122L length for the SR, $19.99, read Nov 9, 2026.
- Cassette: Shimano CS-HG200-8, 8-speed, 12 to 32T, Shimano Altus RD-M310 derailleur, 52T chainring. Aventon's cassette for the Abound SR and LR, SKU 19300-1000193, is $16.99, read Nov 9, 2026.
- Hub motor: Shengyi 36V 750 W rear hub, 1188 W peak, 80 Nm. See Shengyi hub motors explained.
- E-bike controller: the Aventon Controller comes in an Abound SR and Abound LR version, SKU 19004-1200010, $83.99, read Nov 9, 2026.
- E-bike display: Aventon BC147. The Aventon BC147 Display comes in an Abound SR, Abound LR and Pace 4 version, SKU 19004-2100062, $38.99, read Nov 9, 2026.
- Throttle: Aventon left-hand handlebar throttle. The Aventon Throttle for the Abound SR and LR, SKU 19004-5200022, is $17.99, read Nov 9, 2026.
- Pedal assist sensor: double-sided bottom bracket torque sensor.
- E-bike charger: 42V, 4A output. Aventon's Battery Charger for the Abound SR and LR, SKU 19004-7000062, is $60.99, and the Fast Charger fits the Abound SR and LR, $259, read Nov 9, 2026.
- E-bike battery: removable internal 36V, 20Ah, 733Wh with LG 21700 cells. The Extra Aventon Battery for the Abound SR and LR, SKU 19004-4100152, is $499, read Nov 9, 2026. Aventon also sells a Battery Cover for the Abound SR and LR, $18.99, read Nov 9, 2026.
- E-bike lights: front and rear lights with turn signals on the LR. Aventon's Integrated Headlight for the Abound SR and LR, SKU 19004-6100052, is $12.99, and its Integrated Taillight for both, SKU 19004-6200022, is $16.99, read Nov 9, 2026.
- Pedals: 9/16" composite platform. The Aventon Pedal Set for the Abound SR and LR, SKU 19006-2000020, is $8.99, read Nov 9, 2026.
Tools for common jobs
- Hex keys: caliper, stem and handlebar bolts.
- Tire levers: changing a tube.
- Floor pump with gauge: setting pressure within the sidewall range.
- Axle nut wrench: removing the rear motor wheel; check the size on yours.
- Torque wrench: axle nuts, brake bolts and pedals, to your manual's values.
- Pedal wrench: swapping the 9/16" pedals; see replace pedals.
- Brake pad spreader: resetting the pistons before new pads.
- Brake bleed kit: bleeding when the Tektro lever feels soft; see bleed Tektro brakes. Check the fluid with Aventon.
- Chain checker: catching chain wear early.
- Chain lube: after cleaning and wet rides.
- Chain tool: fitting a new chain at the listed length.
- Multimeter: testing charger output at its plug, as shown in check your charger. Never probe the battery.
Where to buy
- Aventon's parts pages linked in the list above; also its displays page, batteries page, tires page and tubes page.
- Independent sellers: parts suppliers.
- A shop or Aventon dealer can order and fit parts: find a shop.
Common repairs
- Aventon troubleshooting and e-bike error codes
- Replace disc brake pads, bed in disc brakes and fix a spongy brake lever
- Bleed Tektro brakes
- Fix a flat on a rear hub motor wheel and set tire pressure
- Clean and lube the chain, check and replace the chain and adjust the rear derailleur
- Check your charger and check the brake cutoff and throttle
Sources
- Abound SR page, aventon.com
- Abound LR page, aventon.com
- tire, aventon.com
- tires page, aventon.com
- 20x3.0 inner tube, aventon.com
- tubes page, aventon.com
- Aventon Controller, aventon.com
- displays page, aventon.com
- Aventon BC147 Display, aventon.com
- Battery Charger, aventon.com
- batteries page, aventon.com
- Hydraulic Brake Complete Set, aventon.com
- 7/8 Speed Chain, aventon.com
- cassette, aventon.com
- Aventon Throttle, aventon.com
- Fast Charger, aventon.com
- Extra Aventon Battery, aventon.com
- Integrated Headlight, aventon.com
- Integrated Taillight, aventon.com
- Aventon Pedal Set, aventon.com
Stuck after these checks? Find a shop near you.
If these steps didn't fix it, find a shop near you in our partner network. For battery or wiring trouble, look for shops marked Battery and electrical.
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