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203 mm 6-Bolt Disc Brake Rotor, Metallic-Pad Rated (generic)

Heavy, fast e-bikes benefit from big rotors, and 203 mm is the size many fat-tire and cargo bikes ship with or upgrade to. Generic stainless 203 mm 6-bolt rotors from brands like Tektro, Jagwire and a dozen unbranded sellers are widely sold; the useful ones are stamped from one piece of stainless, rated for metallic pads, and come with six bolts. Going up to 203 mm from a smaller rotor requires a caliper adapter and a frame or fork rated for it, so this is a like-for-like replacement for most buyers rather than an upgrade.

Replacing a warped 203 mm rotor on a fat-tire or cargo e-bikeRiders using sintered pads who need a metallic-rated rotorHeavy riders who want maximum heat capacity

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Key considerations

Check the listing states it is compatible with metallic pads
Going larger than stock needs an adapter and a fork/frame rated for the size
Check rotor thickness (usually 1.8 mm) matches your caliper's range
Buy with bolts, and use a torque wrench

Pros

Maximum stopping power and heat capacity
Metallic-pad rated versions available
Affordable

Considerations

Heavier
Easier to bend in transit
Brand and finish vary

Compatibility notes

6-bolt hubs and frames/forks rated for 203 mm rotors; confirm your current size before ordering

Keep it running

Replacement parts

Confirm fitment on your bike before ordering — see each part’s compatibility notes.

E-Bike Brake PadsFeatured

Tektro E10.11 Disc Brake Pads

Best for: E-bikes with Tektro HD-E350, HD-M275/M285/M290 style calipers and Aries/Novela mechanicals · Riders who want the OEM pad shape without guessing · Replacing worn resin pads at the first squeal

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Similar alternatives

All brake rotors →

E-Bike Brake Pads

Sintered Metallic Disc Brake Pads, Shimano B01S Shape (generic)

Heavy e-bikes chew through resin pads, and riders who are tired of replacing them every few months often move to sintered metallic pads in the same shape. Aftermarket sintered pads in the Shimano B01S outline fit the same two-piston Shimano calipers and a number of other brands that copied the shape. They last much longer, shrug off heat on long descents, and work better in the wet. The trade-offs are more noise, a little less bite when cold, and faster rotor wear; your rotor must not be one of the resin-only models.

Best for: Heavy riders and cargo e-bikes that eat resin pads · Hilly or wet riding · Anyone who wants longer intervals between pad changes

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Brake Rotors

Shimano SM-RT56 180 mm 6-Bolt Disc Rotor

The SM-RT56 is Shimano's workhorse 6-bolt rotor, found on piles of entry and mid-level bikes and sold everywhere as a replacement. The 180 mm size is a good match for the front of a commuter e-bike and is what many 160 mm-equipped bikes upgrade to for more stopping power. One important detail: the RT56 is specified for resin pads only, so if you run sintered metallic pads you should choose a different rotor. It is a plain stamped steel rotor without a cooling fin or alloy carrier, which is exactly why it is inexpensive and durable.

Best for: Replacing a bent or worn 6-bolt rotor on an e-bike with resin pads · Upgrading a front brake from 160 to 180 mm (with a caliper adapter) · Riders who want a Shimano-quality rotor at a low price

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