Surly Constrictor Clamp, 28.6mm – Black


In stock

SKU: surly.constrictor Category: Tags: , , ,


Surly Constrictor 28.6mm

The Constrictor was designed specifically to end slipping seat posts.
The extra-thick clamp utilizes an 8mm stainless bolt and accommodates a rear cantilever brake hanger, if you decide to go that route.
The Constrictor is machined out of aluminum billet and black anodized. It’s available in 30.0mm and 33.1mm sizes.


A 22.2mm seat post uses a 25.4mm clamp.
A 25.4mm seat post uses a 28.6mm clamp.
A 27.2mm seat post uses a 31.8mm clamp.
Some Eclipse and Equinox frames need a 34.9mm clamp
These are a rule of thumb. Yet, variety exists.

Additional information

Weight .25 lbs
Dimensions 2 × 2 × 2 in