Seatpost Sizing Gauge - Wheels mfg SP-GAUGE-1

Wheels Manufacturing Seatpost Sizing Gauge (SP-GAUGE-1)

Eliminate the guesswork from seat tube and seatpost diameter identification with the shop-essential Wheels Manufacturing Seatpost Sizing Gauge (SP-GAUGE-1). Precision-machined in the USA, this durable, step-machined sizing tool allows mechanic-accurate determination of inner seat tube diameters, ensuring fast, precise selection of replacement seatposts and seatpost shims without relying on hard-to-read markings or vernier calipers.

Key Features:

• Step-Machined Precision: Machined with discrete, laser-engraved sizing steps covering common seatpost and seat tube inner diameters for instant visual verification.
• Eliminates Caliper Error: Drops directly into the frame seat tube to give an immediate, foolproof mechanical test of true inner diameter.
• Construction: Made from durable acrylic for daily workshop use.
• Laser-Etched Markings: Feature high-contrast, permanent laser-etched diameter indicators that remain clear and easy to read even after years of shop service.

Technical Specifications:

• Manufacturer Part Number: SP-GAUGE-1
• Brand: Wheels Manufacturing
• Tool Type: Seatpost / Seat Tube Sizing Gauge
• Measures seat tube inside diameters from 25mm to 34.9mm
• Measured Diameters:  25.0, 25.4, 25.6, 25.8, 26.0, 26.2, 26.4, 26.8, 27.0, 27.2, 27.4, 28.2, 28.6, 28.8, 29.2, 29.4, 30.0, 30.2, 30.4, 30.8, 30.9, 31.4, 31.6, 31.8, 34.9 (covers standard road, MTB, and e-bike sizes)
• Material: Durable Acrylic
• Finish: Red Anodized
• Country of Manufacture: United States

Package Includes:

• 1 x Wheels Manufacturing Seatpost Sizing Gauge (Part No. SP-GAUGE-1)

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