Tern GSD Gen 3: parts and specs

Specs are for the stock bike as sold; check your own bike before you buy. This page covers the Tern GSD Gen 3 compact cargo bike from 2024 on, built as the P10, P00, R14 and S10 on 20 inch wheels. The specs below are for the P00 (Enviolo hub, Gates belt, Bosch Purion 200) and the R14 (Rohloff E14 hub, Gates belt, Bosch Kiox 300, Bosch eBike ABS). The P10 and S10 run a Shimano Deore chain drive instead of the belt. The P00 and R14 use the Bosch Cargo Line mid-drive motor (85 Nm); see Bosch motors explained. Maximum gross vehicle weight is 210 kg (463 lb), with 100 kg (220 lb) on the rear rack. Builds differ by country, so match the part on your bike before you order.

Parts list

• Tire: front Schwalbe Big Ben Plus and rear Tern x Schwalbe Super Moto-X, both with Green Guard puncture protection and Reflex sidewalls on 20 inch Tern Atlas rims (36 mm wide). The R14 runs Schwalbe Pick-Up cargo tires. Schwalbe's Big Ben Plus comes in 55-406 (20 x 2.15), article 11101122, 30 to 55 psi.
• Inner tube: 20 inch. Tern's Inner Tube 20" Schwalbe AV-7 Schrader Valve covers 40-62/406 with a 40 mm Schrader valve and fits the GSD series; $8, out of stock (back soon), read Nov 9, 2026.
• Disc brake pads: Magura Sport pads on the P00. Magura's MDP 9 pads fit its MT and MT C 4-piston brakes in Green or Black compound.
• Brake rotor: P00: 180 mm front and rear. R14: 203 mm front and rear.
• Disc brake caliper: P00: Magura MT5 4-piston hydraulic. R14: Magura MT-C ABS 4-piston hydraulic.
• Brake lever: P00: Magura MT5 e-stop hydraulic with a brake light sensor. R14: Magura MT-C e-stop levers.
• E-bike display: P00: Bosch Purion 200. R14: Bosch Kiox 300 with the LED Remote.
• E-bike charger: 100-240V, 4A (US). The Bosch 4A Charger is part of the smart system lineup.
• E-bike battery: P00: Bosch PowerPack 545 or 540 with fast swap and dual battery bays. R14: Bosch 800 PowerPack. Up to two 800 Wh packs fit. See Bosch's frame batteries for the 545, 540 and 800 packs.
• E-bike lights: Ignis headlight (700 lumens on the R14) and an always-on RearStop brake light wired to the main battery.
• Grips: Ergon.
• Pedals: Urban platform with a non-slip surface and sealed bearings.
• Saddle: Tern GSD saddle by Velo.

Tools for common jobs

• Hex keys: caliper, stem, rack and seatpost bolts.
• Tire levers: changing a 20 inch tube.
• Floor pump with gauge: keeping the cargo tires inside the sidewall range.
• Torque wrench: brake, rack and stem bolts to the values in your manual.
• Brake pad spreader: pushing the four pistons back before new pads.
• Brake bleed kit: bleeding the Magura brakes when the lever goes soft; see bleed Magura brakes.
• Chain checker: P10 and S10 chain builds only.
• Multimeter: testing the charger at its plug, as in check your charger. Never probe the battery.

Where to buy

• Tern's 20 inch Schrader tube.
• Magura's MDP 9 pads and Bosch's frame batteries and chargers through a Tern or Bosch dealer.
• Independent sellers: parts suppliers.
• A Tern dealer orders and fits Bosch parts: find a shop.

Common repairs

• Tern e-bike troubleshooting
• Bosch e-bike troubleshooting and Bosch error codes
• Bleed Magura brakes, replace disc brake pads and bed in disc brakes
• Set tire pressure and e-bike flat tire
• E-bike battery care, battery won't charge and update e-bike firmware
• Check bolts and torque and the e-bike maintenance schedule

Sources

• ternbicycles.com
• ternbicycles.com
• ternbicycles.com
• store.ternbicycles.com
• ternbicycles.com
• Big Ben Plus, schwalbe.com
• Inner Tube 20" Schwalbe AV-7 Schrader Valve, store.ternbicycles.com
• MDP 9 pads, magura.com
• Magura MT5, magura.com
• Bosch Kiox 300, bosch-ebike.com
• 4A Charger, bosch-ebike.com
• frame batteries, bosch-ebike.com

Stuck after these checks? Find a shop near you.