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BMC Fourstroke R 01 vs MMR Rakish: geometry and fit comparison

Matched sizes, stack and reach deltas, and a fit check against your own body instead of guessing from two separate size charts.

2026cross-country geometry
BMC Fourstroke R 01
4 sizes: S, M, L, XL
Full size guide
2026cross-country geometry
MMR Rakish
4 sizes: S, M, L, XL
Full size guide
In one look

The BMC Fourstroke R 01 is built as a cross-country geometry frame, the MMR Rakish as a cross-country geometry frame. Across matched sizes, the MMR Rakish stack sits about 30 mm taller than the BMC Fourstroke R 01, which generally means a more upright position before spacers. The MMR Rakish cockpit is slightly shorter, by about 9 mm.

For the BMC Fourstroke R 01 in M, L, XL there is no MMR Rakish size with a comparable position: the range simply does not reach there.

Switching from a BMC Fourstroke R 01?

Your closest MMR Rakish size, and what will still feel different about the position.

You ride the BMC Fourstroke R 01 inTake the MMR Rakish inThe position will feel
SM30 mm taller · 9 mm shorterDifferent position

Which one fits you better?

Run the same measurements through both frames. The likely size and the full fit report can differ more than the spec sheets suggest.

Quick size check

What BMC Fourstroke R 01 size fits you?

Get an instant frame estimate, then continue into the full fit report to check cockpit reach, bar drop, and setup risks before you buy.

No account needed for this check. The full report keeps this bike preselected.

Quick size check

What MMR Rakish size fits you?

Get an instant frame estimate, then continue into the full fit report to check cockpit reach, bar drop, and setup risks before you buy.

No account needed for this check. The full report keeps this bike preselected.

FAQ

Which has the taller front end: BMC Fourstroke R 01 or MMR Rakish?

Across matched sizes, the MMR Rakish stack sits about 30 mm taller than the BMC Fourstroke R 01, which generally means a more upright position before spacers.

Can the same rider take different sizes on these two bikes?

Yes, and it happens often: frame labels are not standardized. Use the matched-size table for geometry, then run the fit check below with your own measurements for each bike.

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