Santa Cruz Blur 4 bike fit and size guide
Review the published geometry for the 2026 Santa Cruz Blur 4, compare supported sizes, and open the TrainCraft calculator with this bike preselected.
Geometry and size breakdown
The calculator button opens the bike step with this model and size already selected. Then enter rider measurements and run the fit report.
| Size | Stack | Reach | Top tube | Head tube | Stem | Crank | Fit calculator |
|---|---|---|---|---|---|---|---|
| S | 587 mm | 412 mm | 568 mm | 90 mm | 50 mm | 170 mm | Use in calculator |
| M | 597 mm | 438 mm | 597 mm | 100 mm | 50 mm | 170 mm | Use in calculator |
| L | 607 mm | 458 mm | 621 mm | 110 mm | 60 mm | 175 mm | Use in calculator |
| XL | 621 mm | 483 mm | 652 mm | 125 mm | 60 mm | 175 mm | Use in calculator |
How to use this guide
Start with the size table to narrow the geometry range you actually want. Then open the calculator to compare that geometry against your body dimensions, flexibility, and fit priorities.
The TrainCraft bike fit tool models saddle height, cockpit reach, and bar drop using the frame geometry plus stock cockpit assumptions for the Santa Cruz Blur 4.
That is more useful than a generic height chart because two sizes can both fit your height while requiring very different stems, spacers, or saddle positions.
FAQ
What sizes are available for the Santa Cruz Blur 4?
TrainCraft currently tracks these Santa Cruz Blur 4 sizes: S, M, L, XL. The calculator uses each size's published geometry and stock cockpit assumptions to compare fit outcomes.
Can I use the TrainCraft calculator for Santa Cruz Blur 4 sizing?
Yes. Open the calculator from this page to preload the Santa Cruz Blur 4, then compare sizes against your body measurements, fit priorities, flexibility, and riding posture preferences.
What should I compare on the Santa Cruz Blur 4 before picking a size?
Start with stack, reach, effective top tube, and the stock stem/crank setup. TrainCraft uses those numbers to estimate cockpit reach, bar drop, saddle position, and how much adjustment headroom each size leaves.
Related mountain bike guides
Use nearby model pages to compare positioning trends before choosing between similar bikes.