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🚲 Hardtail, Fixed Fork & Standard Bike

Standard diamond-frame bikes are the easy case for our kits. Confirm a threaded 68 to 73mm bottom bracket or open 100mm dropouts and you're set.

July 12, 20261 min read

🚲 Hardtail, Fixed Fork & Standard Bike

A customer's Bafang-converted hardtail bike

Good news: this is the easy case. Standard diamond-frame bikes — hardtail mountain bikes, fixed-fork hybrids, commuters, and most everyday bicycles — are exactly what these kits are designed for. There's not much extra to think about.

Just confirm the two universals:

  • Mid-drive: a threaded 68–73mm BSA/JIS bottom bracket (BBSHD also in 74–100 / 101–120mm). Press-fit shells need an adapter.
  • Front hub: open 100mm dropouts, plus a torque arm on aluminum/carbon forks.
Run through the Fitment Quiz to confirm your specific frame and pick a chainring size, and skim our Mid Drive vs. Front Hub and Battery Range guides if you're still deciding which kit to buy.

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