News & Updates

Bug Fix — Canvas Coordinate Drift

A bug was identified where the screen-space overlay (ground line, wheelbase label, CoG reference) would drift away from the correct position when the user zoomed in with ground leveling active.

Root cause

The overlay was computing tire contact points in un-rotated mm-space and then applying the rotation matrix — but the rotation origin differed by a small offset between the two canvas layers, causing accumulating drift at high zoom levels.

Fix

All screen-space calculations now use a shared rotation origin anchored to the BB (bottom bracket) pixel position, consistent across all canvas layers. The overlay is also re-drawn on every ResizeObserver event to handle panel resize correctly.

Affected features

• Ground line
• Wheelbase annotation
• Front vertical line
• CoG horizontal projection
• AR/AS 100% reference dot

What is True_Fit?

Traditional geometry charts show reach and stack measured from a static, unloaded frame. True_Fit goes further: it calculates where your actual contact points (bars, saddle, pedals) land when the bike is ridden at 25% sag — the position that matters for fit.

What's new

• Full 3D geometry computation via Rhino Compute
• Bar reach & bar stack at sag, per size
• Saddle height relative to BB at real sag
• Compatible with all bike types (Fully, Hardtail, Gravel, Road)

What's next

• Rider anthropometry integration (BDC scan)
• Live slider-driven updates
• PDF export per size

This is the foundation everything else is built on. More soon.

Kinematic Editor Update

The kinematic editor received a major quality-of-life update this week.

New features

• Undo / Redo — 64-step history, keyboard shortcuts Ctrl+Z / Ctrl+Y
• Ground leveling — the bike canvas automatically rotates so both tyre contact points are on the same horizontal line
• Background photo — upload a side-view photo as a canvas backdrop and dial in opacity
• Screen-space overlay — wheelbase, ground line and CoG reference stay level on screen even as the bike rotates

Anti-Rise & Anti-Squat

The AR and AS calculations now use pixel-space geometry, so they are always consistent with the drawn chainline regardless of rotation or zoom.

Coming next

• WebSocket connection to Rhino Compute for live kinematic curves
• Per kinematic-type pivot presets

Manual Rider Scan

While we finalise the AI BodyScan feature, you can now enter your measurements manually and generate a complete Body Dimension Chart (BDC) profile.

What you measure

• Body height
• Inseam, femur, shin, ankle
• Hip width, hip-to-shoulder, shoulder width
• Upper arm, forearm, grip-to-wrist
• EU shoe size, helmet circumference

What you get

• Full stickman skeleton scaled to your exact proportions
• Geometry recommendations based on your BDC
• Saddle height, reach, and stack estimates
• Compatibility check against your saved bike builds

The AI BodyScan (phone camera → automatic landmark detection) is in development and will replace the manual process for most users. Manual entry will remain as a fallback.

Parts Database Expansion

The component database now includes over 3,000 verified parts across the most important kinematic categories.

Coverage

| Category | Records | |---|---| | Forks | 740+ | | Rear Shocks | 480+ | | Cranks | 310+ | | Cassettes | 290+ | | Chainrings | 380+ |

Manufacturers included

RockShox, Fox, Öhlins, DVO, MRP, SRAM, Shimano, e*thirteen, Rotor, Wolf Tooth, Race Face, and more.

Known gaps

Some older model years and regional variants are still incomplete. If you find a missing component, use the Contribute section to flag it — we review submissions weekly.

Next steps

The scraper pipeline is being improved to capture full spec sheets including eye-to-eye, stroke, axle-to-crown and offset values automatically.