Presta vs Schrader Valves: What Sealant Setup Do You Actually Need?

Before you can add sealant, you need to know what valve you're working with. Get it wrong and you'll be fighting the wrong adapter, or wondering why you can't get the core out. Here's the plain-English version.

How to tell Presta from Schrader

• Presta — the slim, narrow valve you'll find on most road, gravel and modern MTB wheels. It has a small knurled nut on top you unscrew before inflating. Lighter, holds high pressure well.
• Schrader — the fatter valve, the same type used on cars and motorbikes. Common on e-bikes, kids' bikes, e-scooters and many hybrids. Spring-loaded, no top nut.

The bit that actually matters for sealant: the core

To add sealant cleanly you want a removable valve core. Take the core out and you've got a clear, wide-open path straight into the tyre — no forcing liquid past a spring. Most quality tubeless valves (Presta and Schrader) have removable cores; you'll need a small core-removal tool, which many sealant injectors include.

The cleanest way to get sealant in

1. Deflate the tyre and rotate the valve to the bottom (6 o'clock).
2. Unscrew and remove the valve core.
3. Inject a measured dose with a Magic Milk Tyre Sealant Injector.
4. Refit the core, inflate, and spin the wheel to spread the sealant.

No core tool handy? Reach for the 65 ml bottle — it uses a simple cap that fits Presta and Schrader valves, ideal for pouring in before you seat the last of the bead, or for a quick trail-side top-up.

Upgrade the valve itself

Cheap valves clog and leak. Magic Milk Tubeless Valves are built for reliable, mess-free sealant setups, with a cap that accommodates tyre inserts — so you're not stuck choosing between run-flat protection and a clean install.

Sorted on valves? Line up the rest of your kit in accessories, then dose up from the tubeless range.