Carradice SQR system & carbon seat post

soltydog · May 2007

Looking at getting a caradice bad with sqr system for my allez elite, but after reading this months cycling plus tourers test, it comments about not using a seatpost mounted rack with carbon posts. Would the sqr system be compatable with my carbon seatpost, or should i replace that too ?

Also which bag would be most suitable for a road bike the sqr tour, or trax.

Cheers
Paul

rdaviesb · May 2007

I'm running a small saddlebag on an SQR mounted on a carbon post. As the weight is minimal I'm happy enough with it. One thing to watch out for though is the bolt lengths - you don't want to end up marking the carbon, so I've cut mine down by 5mm to make sure they are safe.

alexB · May 2007

I've always assumed that the reason long carbon posts are comfortable is that they flex backwards along their length slightly. If you clamp an SQR block to a carbon post you add two rigid bands part way down the length and then suspend a load of weight off them. I doubt the total suspended weight reaches anywhere near the load limit for the post (unless you are already a heavyweight rider), but I do think that you might be placing a stress point on the post where it's not designed to have one and you are also preventing it from flexing, thus reducing its effectiveness.

In my opinion you'd be better off fitting a USE shockpost or similar. The the Carradice is held as unsuspended weight and you get the shock absorption qualities appropriate to your actual weight.

amaferanga · May 2007

I've been using an SQR Tour on a carbon fiber post for a while now. I just wrapped some tape around the post to stop the clamps from scratching it. Can't see there's much to worry about provided you don't load the bag up beyond what the mounting bracket is designed for.

Carradice SQR system & carbon seat post

Comments

Categories