I Made My 5.5kg BMC Even Lighter - Diminishing Returns Hit Hard

In Part 2 of my attempt to build a genuinely raceable 5kg hill climb bike, things start to get a lot harder.
After Part 1, I took on loads of your suggestions and made a series of logical weight-saving changes, removing inefficiencies, optimising parts I already had, and revisiting some decisions from earlier in the build.

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2026/01/12 00:00:00 PST - 2026/01/18 23:59:59 PST

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Timestamps
0:00 Intro
0:57 Your Suggestions
2:48 OSPW
4:10 Tyres
6:06 Skewers
6:44 Shifter Clamps
8:00 Chainring
9:10 ZTTO SLR gen 3 Cassette
11:10 Shorter Chain
12:28 Conclusions and Final Weight

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