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SUPER73 S1 and S2: parts and specs

Replacement parts and specs for the SUPER73 S1 and S2: 20 inch fat tubes, 2-piston ceramic pads by model year, the 54.6V 3A charger, the 48V 20Ah S2/R battery and the S1 battery, with SUPER73's links and prices.

Last edited Nov 9, 2026 by Pedalwise team Edit History Add a subpage

The Pedalwise team started this page from official manuals, support pages and repair videos. Fixed this yourself, or spotted something wrong? Help improve it.

This page lists the common replacement parts for the SUPER73 S1 and S2. Specs are for the stock bikes as sold; check your own bike before you buy. Full details for the S2 are on the S2 product page. Some parts changed over the years, so several fit notes below depend on model year.

Photo needed: A SUPER73 S2 from the side, showing the wide front and rear tires and the brake caliper.. 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: S2 runs BDGR tires, 4.5" front and 5" rear. SUPER73's BDGR Tire 20in. x 4.5in. and BDGR Tire 20in. x 5in. fit all S series bikes, $40 each (regular price $80), read Nov 9, 2026. GRZLY, LZRD and Huntsman tires come in 20 inch sizes too, so match the size on your sidewall.
  • Inner tube: 20" x 4.5/5" tubes on the S2. SUPER73's inner tube 20" x 4"/4.5"/5" fits all S series bikes, $10 (regular price $20), read Nov 9, 2026. The valve type isn't stated.
  • Disc brake pads: SUPER73's 2-piston ceramic brake pads fit the S1, the S2 (2023 and earlier), the S2 X Indian and the S Adventure Series (2023 and earlier), $12.50 a pair for one wheel (regular price $25), read Nov 9, 2026. They fit only 2-piston calipers and not Magura brakes. For a 2024 S2, check your caliper or ask SUPER73.
  • Disc brake caliper: S2 has hydraulic brakes. The brake maker isn't named.
  • Hub motor: S2, 750W nominal.
  • E-bike display: S2 has a Smart Display with Bluetooth app connection.
  • Throttle: thumb throttle. SUPER73's Thumb Throttle fits the S series but not the S1, $20, read Nov 9, 2026.
  • E-bike charger: SUPER73's Battery Charger 54.6V 3A fits the S1, S2, S2 X Indian and S Adventure Series, 3-pin plug, $100, read Nov 9, 2026.
  • E-bike battery: S2 has a 48V, 20Ah, 960 Wh removable battery. SUPER73's S2/R Series Battery 48V / 20Ah fits all S series and R series bikes, $995, read Nov 9, 2026. SUPER73 also sells an S1 battery, 48V 14.5Ah. The charger and battery mount are sold separately.
  • E-bike lights: LED headlight and taillight.

Tools for common jobs

  • Hex keys: removing the caliper bolts takes a 5 mm hex.
  • Brake pad spreader: pushing the pistons back with a piston press before fitting new pads.
  • Brake bleed kit: bleeding the S2 hydraulic brakes. The maker isn't named, so confirm the fluid with SUPER73 first.
  • Tire levers: changing the 20 inch fat tire or tube.
  • Floor pump with gauge: pumping to the range on your tire sidewall after a tube change.
  • Axle nut wrench: removing the rear hub motor wheel to fix a flat.
  • Torque wrench: tightening axle nuts and caliper bolts to the values in your manual.
  • Chain checker: checking chain wear on the single speed drivetrain.
  • Chain lube: regular chain care.

Where to buy

  • SUPER73's own replacement parts collection sells tubes, tires, brake pads, chargers, batteries and a thumb throttle. Prices and fit notes are on each part's page.
  • For a controller, display or motor, contact SUPER73 support so the part matches your bike and model year.
  • Independent sellers are listed on our parts suppliers page.
  • A local shop can order and fit parts: find a shop.

Common repairs

Sources

Stuck after these checks? Find a shop near you.

Need a pro?

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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