Valve type
Schrader valve (AV): stem size, cores and pump heads
How to recognize a Schrader valve, Park Tool's 8 mm stem figure, how a pump fitting opens it, and the heads and core tools makers list for it.
Also listed as AV, car valve, American valve
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Short answer
A Schrader valve is the wider, car-style valve. Park Tool gives the stem as about 8 mm (5/16 in), and a Schrader fitting works by pressing the valve's internal stem with a plunger. Its core comes out with a core tool such as Park Tool's VC-1. Confirm yours with the valve finder.
What fitsAll 4 items that fit
Key facts
- How to recognize it
- A wider stem with a spring-loaded core inside. Schrader-compatible pump fittings press the valve's internal stem with a plunger so the tube can fill.[1][2]
- Stem diameter
- About 8 mm (5/16 in) (Park Tool).[2]
- Valve core
- Removable: Park Tool's VC-1 removes and installs Schrader cores.[3]
- Pump heads makers list
- Lezyne lists its Dual Valve floor-pump head for Schrader, Presta and Dunlop. Lezyne's Slip Fit hand-pump head and SILCA's Pocket Impero are Presta-only, so check the maker's list.[4][5]
- Adapters and extenders
- Not confirmedWe read no maker source on Schrader adapters or extenders.
- Schwalbe code
- AV (car valve)[6]
- Adding sealant
- Tubolito says its Schrader (AV) valves have removable cores that accept sealant, unlike its glued-in Presta cores.[7]Applies to Tubolito tubes only.
- Heat caution
- Not confirmedFor plastic valves on TPU tubes, see the TPU tube valve page.
- Tools
- Park Tool's VC-1 valve core tool.[3]
- Not confirmed
- No source we read says which bikes come with Schrader valves, and we read no maker source on Schrader adapters.[2]
Watch out for
- Presta-only heads, such as SILCA's Pocket Impero and Lezyne's Slip Fit, will not take a Schrader valve.
- Park Tool's Schrader figure is approximate (about 8 mm), while its Presta figure is nominal (6 mm).
- Tubolito's Schrader cores come out for sealant; its Presta cores do not.
What fits
Product details below are the seller's own description unless a source is shown. Pick the variant named for each item.
Floor pump
Topeak JoeBlow Sport III floor pump (160 psi, TwinHead DX)Choose the JoeBlow Sport III (TJB-S6); it is the only version listed.
Topeak lists a head for Presta and Schrader valves.
Floor pump
Park Tool PFP‑10 Home Mechanic floor pump (160 psi)Choose the PFP-10; it is the only version listed.
Park Tool lists a head for Presta and Schrader valves.
Mini pump
Topeak RaceRocket HP mini pump (160 psi, Presta and Schrader)Choose the RaceRocket HP in black; it is the only version listed.
Topeak lists a head for Presta and Schrader valves.
Mini pump and CO2 head
ROCKBROS mini hand pump and CO2 inflator 2‑in‑1 (110 psi, Presta and Schrader)Choose the 2-in-1 pump; CO2 cartridges are not included.
ROCKBROS lists Presta and Schrader.
Next: Presta vs Schrader vs Dunlop and dual-valve pump heads explained.