Brake Hydraulics
From Unofficial Zero Manual
| Models | Front | |||
|---|---|---|---|---|
| Platform | Years | Caliper Piston Area | MC Piston Area | Hydraulic-Advantage Ratio |
| S | 2015 | 1509 mm² (total) | 126 mm² | 11.9:1 |
| 2016 | ||||
| 2017 | ||||
| 2018 | ||||
| 2019 | ||||
| 2020 | ||||
- Regarding Brake Upgrades:
- A 9.5mm-piston master cylinder - like the Nissin 3/8 I put on my 'MX' bike - would give the SR a 21.1:1 ratio, or @ 78% more pad pressure than the OEM 12.7mm master cylinder.
- Any Brembo, Nissin, etc. 9.5mm / .375" master cylinder w/switch should drop right in and make a huge difference, and you won't have to touch anything else.
- On the rear, the 11mm master cylinder from the FX (Zero part# 25-06731) has 49mm M6 bolt spacing / rear reservoir hose / top output / clevis, and should give @ 19% more pad pressure than the SR 12mm master cylinder.
- This won't be a night-and-day difference like the front master cylinder change, but it should still be very noticeable.
