Smart Gauge D2

The Topeak SmartGauge D2 is a pocket digital pressure gauge for bike tyres, suspension forks and rear shocks. Its SmartHead fits Presta and Schrader valves without swapping parts and rotates through 180 degrees, the LCD reads up to 250 psi (17 bar) in psi, bar or kg/cm², and a bleed button lets you fine-tune pressure.

What it is

A digital gauge that tells you exactly what is in your tyre or shock, so you stop guessing by squeezing the sidewall. Slide the selector to Presta or Schrader, press the SmartHead onto the valve, and the number comes up on the screen. Too much? Tap the air release button and bleed it down a little at a time until the reading lands where you want it.

Who it's for

Riders who care about a few psi. Mountain bikers running low tubeless pressures for grip on the loose, dusty climbs of the Gold Coast hinterland, gravel riders who drop pressure for corrugations, and roadies who want the same number every Sunday morning. With a 250 psi ceiling it also covers air forks and rear shocks, so one gauge sets up the whole bike. Riders on a single bike with a trusted floor pump gauge are already covered; the SmartGauge D2 earns its place once you run tubeless, air suspension or a second bike.

Key details

• Range: reads up to 250 psi (17 bar)
• Units: psi, bar or kg/cm², chosen with the unit button
• Valves: Presta and Schrader through the one SmartHead, no adapters
• Head: rotates 180 degrees, so you can reach a valve squeezed between disc rotor and spokes
• Bleed: air release button for fine adjustment
• Size and weight: 10.2 x 4.5 x 3.5 cm and 65 g
• Power: one CR2032 coin cell, supplied

Looking after it

Treat it like the small electronic tool it is. Keep it out of dust and sand, wipe it dry straight away if it gets wet, and clean it without alcohol or thinners. Keep it clear of magnets, do not drop it, and press and hold the power button for three seconds to switch it off after use. When the low battery symbol appears, swap in a fresh CR2032.