S&M P-Guts 

To be used in conjunction with the S&M P-rail seat which allows you to adjust how far back/forwards your seat is when used with a pivotal seat post. Can also be used with any other 8mm railed seat if you drill a hole through your seat for the bolt to go through.

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Specifications

• Brand: S&M
• Website: www.sandmbikes.com
• Weight: 95g