1" Donut Seat Clamp - Red

Full-radius donut seat clamp in 1" size, machined from 6061-T6 aluminum. Hutch donut seat clamps include a titanium cap screw as a premium feature. Red anodized finish. Made in USA.

Fits vintage old-school chromoly frames that have a 7/8" diameter seat post.
Note: Hole is 1.000" diameter. This is designed to fit with old-school chromoly BMX seat posts that are 7/8" diameter and used in conjunction with frame seat masts that are 1" OD with 0.062" wall section. In an effort to reduce weight, some batches of old-school frames (including Hutch) were made with a thinner seat mast wall section, thus requiring a larger diameter seat post such as 22.4mm or 22.6mm. This clamp is designed to work with a proper seat mast/seat post combination that equals the correct 1.000" stack. Check for proper fit of all components. Refunds/exchanges are not provided for seat clamp damage due to improper components installation.


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