Park Tool PMP-4.2 Pump Mini - Black Giant There are four ring size

There are four ring size options: Adventure has 38 teeth

Available for 26"

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Park Tool PMP-4.2 Pump Mini - Black Giant There are four ring sizeThis small mini pump is a perfect size to take along on a bike ride, offering an ideal balance of portability and pumping power. Ideal to take along when space and weight are an issue. Aluminum barrel with a soft touch dual density flip out handle. The locking head is Presta and Schrader valve compatible. Includes pump holder and hardware to securely attach to water bottle bosses or under bottle cage. Specifications Maximum pressure: 90 psi (6 bar)