Zephyr Square-Back Quill
Stem · Old School line · Zephyr
The Zephyr Square-Back Quill is a 1980s stem from the Old School line. Fitted to the stock bike on its own, it moves every trait by less than 1%, and weighs 110 g more than the stock stem.
Riding
How traits workAgainst the stock bike with only this part swapped, worked out from its real specs. A whole build is worked out together, so parts don’t simply add up; weight counts.
| SpeedAcceleration and top speed | 0% | ||
|---|---|---|---|
| PopHop height | 0% | ||
| GripTire traction | 0% | ||
| ControlBraking and steering | 0% |
Measured effects what these mean
| Acceleration | −0.1% | ||
|---|---|---|---|
| Sprint speed | — | ||
| Hop | −0.2% | ||
| Grip | — | ||
| Rolling resistance lower is better | — | ||
| Braking | — | ||
| Steering | — |
Specs
| Material | 4130 chromoly |
|---|---|
| Type | Quill |
| Retail price | $85 a comparable real part |
| Reach | 55 mm |
Construction
- Square-back 4-bolt clamp
- Wedge quill
How to get it
Reach level 33, then buy it for 150 credits in the BMX shop, Parts › Stem. Once it’s yours it stays usable whatever its level.
Finishes
Painted in the shop’s Paint tab; 52 finishes fit. Cosmetic. All metal finishes.
Starter
- Gloss Blackstarter
- ED Blackstarter
- Flat Blackstarter
- Gloss Whitestarter
- Black Anodisedstarter
- Polishedstarter
By level
- Raw + Clearlevel 2
- Fire Redlevel 2
- Pacific Bluelevel 2
- Show Chromefactory
- Bonelevel 4
- Army Greenlevel 7
- Safety Orangelevel 7
- Teallevel 10
- Mintlevel 10
- Red Anodisedlevel 10
- Blue Anodisedlevel 10
- Trans Bluelevel 12
- Trans Redlevel 12
- Burgundylevel 16
- Hot Pinklevel 19
- Lavenderlevel 19
- Trans Purplelevel 22
- Trans Greenlevel 22
- Neon Yellowlevel 26
- Gold Anodisedlevel 29
- Trans Goldlevel 33
- Oil Slicklevel 45
- Chameleon Fliplevel 57
- Rider-Aged Rustlevel 66
Prestige
- Carbon Weavelevel 78
- Raw Titaniumlevel 82
- Black Chromelevel 86
- Candy Applelevel 88
- Ultravioletlevel 92
- Pearl Whitelevel 95
- 24K Chromelevel 100
Earn-only (15)
- Founder TealStarter pack
- Trick Book GoldFill the Trick Book
- Holo FlipFill the Trick Book
- Podium GoldWin in rooms
- Race SilverWin in rooms
- Platinum FlakeWin Platinum medals
- AuroraEvery 28th check-in
- EmberEvery 28th check-in
- GlacierEvery 28th check-in
- Sunset FadeEvery 28th check-in
- ToxicEvery 28th check-in
- StormEvery 28th check-in
- Veteran BronzeReach its level
- Elite PlasmaReach its level
- Legend GoldReach its level
Other stems
All stems| Part | Line | Level | Price | Speed | Pop | Grip | Control |
|---|---|---|---|---|---|---|---|
 Parallax Race StemParallax · Race line |
Race | 33 | 100 | · | · | · | · |
 Vortex Gold Race QuillVortex · Old School line |
Old School | 26 | 125 | · | · | · | · |
 Primal TowerloadPrimal · Mid School line |
Mid School | 19 | 105 | · | · | · | · |
 Knotted Stack Top LoadKnotted · Pro line |
Pro | 12 | 125 | · | · | · | · |
 Obsidian Pocket StemObsidian · Signature line |
Signature | 57 | 160 | · | · | · | · |
 Obsidian Slab Front LoadObsidian · Pro line |
Pro | 4 | 135 | · | · | · | · |
More from Zephyr
ZephyrZephyr Pro Pad Set, Zephyr Pistol III, Zephyr Aero Seat, Zephyr Axle Stubs ×4, Zephyr V-Bars, Zephyr Moto Fork, Zephyr Freestyler, Zephyr Master Twin