Three new ways to choose, compare, and start — plus a new check and two fixes. • Help Me Choose — a guided flow. Tell it how you ride and a couple of body measurements, and it ranks frames that actually fit your geometry — and shows you why each one made the list (stack, reach, the math). It's a starting point, not a verdict: the fit estimate is from your height, so confirm with a fitter before you buy. No brand pays to rank higher — everything's judged on the same axes. • Complete Bikes — browse 70+ real, manufacturer-spec'd complete bikes (road, gravel, all-road — no MTB), compare them against your own custom builds, and see "buy it complete vs. build it yourself" pricing on one screen. Every single bike opens straight into an editable build — swap one part or all of them, and the compatibility engine keeps checking as you go. • Compare 2.0 — line up to six builds side by side with photos, total weight, total price, and full geometry. The best number in each row is highlighted, the gap to it is spelled out, and weight + cost are charted so the trade-offs jump out. • New check: cassette vs. derailleur range. You'll get a heads-up when a cassette's large cog is outside what your rear derailleur is rated to handle — that's 28 compatibility checks now running behind the scenes. • Fixed: brands now sort A–Z no matter how they capitalize their name (sorry, evolve — you're back where you belong). And "Buy" buttons that were missing for several direct-to-consumer brands now route correctly to the retailer's product page. • As always: when we can't verify a number, we show the gap instead of inventing one. 700+ parts across 100+ brands, updated weekly without app updates. Don't see a brand you want? Email bikebuilder.hq@gmail.com.

Fixes & sturdier plumbing. • Compare Builds: the "+" button on the empty compare screen now opens the build picker (it was unresponsive — sorry!). There's also a big friendly Add a Build button right on the screen now. • Chainring picker: rings are no longer incorrectly blocked on cranks whose BCD spec carries extra text (e.g. "110mm (4-bolt)" now matches "110mm" rings). • New check: you'll see a heads-up when a standalone chainring's speed rating doesn't match your drivetrain. • New check: tires measure wider than their label on wide rims — you'll get a heads-up when your combo is likely to run close to the frame's clearance limit. • Added support for Cannondale's PF30-83 Ai bottom bracket shell (SuperSix EVO CX/SE). • Under the hood: weekly catalog updates are much more resilient — a single unusual field in new catalog data can no longer hold up the whole refresh. The catalog keeps growing — now 700+ parts across 100+ brands, updated weekly without app updates. Don't see a brand you want? Email bikebuilder.hq@gmail.com.

The compatibility update. Bike Builder now runs 25 checks on your build (up from 18) — including the stuff that's bitten real riders: • One-piece cockpits: frames that need an integrated bar-stem now say so, and the stem slot explains itself. • Proprietary steerers and seatposts get flagged — with the maker's own notes. • Hookless rims: tires their manufacturer says aren't hookless-compatible are grayed out with the reason. Conditional ones tell you to check the chart first. • Electronic-only frames warn you before you fall for a mechanical groupset they can't route. • Campagnolo's new QCK-Tech and Pro-Tech bottom brackets are in. • Honest share cards: an unfinished build now says "WEIGHT SO FAR" and how many parts are left to pick. We check what manufacturers publish, but always confirm with the manufacturer before you buy. Happy building.

Smarter builds. Change your mind mid-build - swap a frame, crank, or groupset - and Bike Builder now walks the change through your whole build: anything that no longer fits gets flagged with a plain-English reason, and you choose to apply or keep. No more silent mismatches. Honest prices. Fixed a bug that displayed wildly wrong MSRPs on some parts (a few wheelsets were showing six figures - sorry about that). Bottom bracket prices also now track our freshly verified data. Fewer false alarms. The compatibility checker no longer flags perfectly good fork/frame and rotor pairings over label wording differences - and it still catches the real problems. Plus the latest catalog: 150 framesets, 648 components, every one verified against manufacturer data. Built openly. New brands every week. Holler: bikebuilder.hq@gmail.com

Updated description to reflect a growing catalog and active development. Same app, same features — just a clearer picture of what's here today and what's coming.

Polish and refinements.