01 — Measure
Rider Measurements
Structured inputs and proportional analysis define your ideal fit profile — reach targets, stack targets, and cockpit feel preference. AI vision or manual entry.
Fit Intelligence Platform
The First End‑to‑End Fit Intelligence System.
Connecting bike geometry and rider measurements from purchase decision to post‑ride optimization.
Free to start. No credit card required.
Canyon Spectral
Size M
Match
81% Fit Score
Fit Analysis
Reach
450mm(-1mm)
Essentially perfect reach
Stack
610mm(+37mm)
Stack is notably high
✓
Overall Assessment
Great match with minor cockpit adjustments
Why This Bike Fits You
1 Reach is 1mm shorter than your 451mm target — excellent
2 Stack is 37mm above your 573mm target
3 81% fit score — great match with minor cockpit adjustments
Geometry & Specs (Size M)
450
Reach (mm)
610
Stack (mm)
64°
Head Angle
78°
Seat Angle
1225
Wheelbase
440
Chainstay
160mm
Front Travel
150mm
Rear Travel
From guessing to dialed.
Size charts estimate. PerfectBike analyzes.
Traditional Sizing vs. PerfectBike
Traditional Sizing
Small5'1" – 5'5"
Reach: 430mm
Medium5'5" – 5'9"
Reach: 455mm
Large5'9" – 6'1"
Reach: 475mm
X‑Large6'1" – 6'4"
Reach: 495mm
XX‑Large6'4" – 6'7"
Reach: 520mm
Height-based ranges. No geometry context. A 5'9" rider with long arms gets the same recommendation as one with a short reach.
PerfectBike Analysis
Evil The Offering
Size S · MTB Trail
Match
78% Fit
Reach
445mm (+2) ✓
Cockpit Stack
755mm ⚙
Frame Stack
612mm ✓
Bar Rise Adj.
+25mm needed
Recommended Adjustments
Headset Spacers
Handlebar Rise
Saddle Position
Est. $40–$180 · 45 min total
✓ Match confirmed
78%
How PerfectBike Works
Structured inputs. Model-specific geometry. Objective verdicts.
Three precision engines working together — from your body to your ideal cockpit position.
02 — Analyze
Geometry Engine
Model-specific frame geometry evaluated against your targets. Real math on real data — not a height-based guess.
03 — Verdict
Fit Report
Clear, objective outputs — before you buy and after you ride. Fit score, delta analysis, adjustment costs, and negotiation leverage on used bikes.
Full Lifecycle
Before You Buy. After You Ride.
PerfectBike covers both sides of the purchase — fit intelligence that stays with you.
Pre‑Purchase
- Compare models and sizes with your body as the constant
- Analyze used listings for fit and negotiation leverage
- Reduce buyer's remorse with data‑backed decisions
- Validate geometry before committing to purchase
Post‑Purchase
- Optimize cockpit setup — saddle, bars, stem
- Address discomfort with targeted pain diagnosis
- Fine‑tune ride characteristics as you evolve
- Maintain fit over time with your stored profile
Geometry data from leading manufacturers
FAQ
Common questions
Everything about getting your perfect fit — whether you're a rider, a shop, or an industry partner.
PerfectBike uses AI vision to analyze your body proportions — torso, arm reach, inseam — then matches against a growing database of bike geometries from major brands. You get a precise fit verdict with reach, stack, and cockpit recommendations. Not a size chart — real geometry math.
Yes — your first use of every workflow is completely free. After that, token packs start at $9 for 5 fits. No subscription required, no credit card to get started.
Absolutely. Paste any Pinkbike, Facebook Marketplace, or Craigslist URL. You get a fit verdict, required adjustments with cost estimates, and concrete negotiation leverage.
Mountain bikes (hardtail & full suspension), gravel, road, commuter, and eBikes across a growing catalog of major brands — new models added regularly.
Coming soon. Our Industry tier will provide a white-label fit widget and API that replaces generic size charts on retailer and manufacturer product pages. Contact us to join the waitlist.
Reach predictions validated within 1mm of professional Retül fitting systems. All key measurements from a single photo.
Join the waitlist
We're building an AI-powered bike fit platform that matches you to the right bike before you buy. Drop your email and we'll let you know when it's ready.