Buying a seat-clamp

IDave

I'm looking to buy a new one to ditch the plasticky POS that came as standard on my Boardman.

My Question is - how do I know what size to buy?

Do I measure the diameter of the seat post?

Or do I measure the diameter of the seat tube?

Thanks in advance.

welshkev

Take your old one off, the size should be written on the inside

cooldad

The tube. As that's what it fits round.

IDave

Thanks, I just checked and there is '35' stamped on the inside of the seatclamp, and I have measured the seat tube and it is indeed 35mm.

So when buying a new seat post I take it you just take the inner diameter measurements?

The Rookie

Yes......

welshkev

Or take your seat post out, it should be written on the end of it

rockmonkeysc

Don't buy a Hope qr clamp

IDave

RockmonkeySC wrote:

Don't buy a Hope qr clamp

Why not?

cooldad

Most commonly will be shown as 34.9mm, not 35..

rockmonkeysc

IDave wrote:

RockmonkeySC wrote:

Don't buy a Hope qr clamp

Why not?

Expensive and not very good. They don't last long.
Salsa qr clamps are much better.

supersonic

If the one you haves work, keep it. Hope are crap.

IDave

How about this Da Bomb one?

http://www.chainreactioncycles.com/da-b ... -prod69877

felix.london

I've gotta 34.9 Superstar Simple QR Seatclamp in red. Just replaced it with a Superstar non-QR clamp. Yours for a fiver if you want it.

poah

IDave wrote:

How about this Da Bomb one?

http://www.chainreactioncycles.com/da-b ... -prod69877

had one on my bike before I got a dropper - it does the job but its also £15 for a clamp.

have one of these now

http://www.wiggle.co.uk/bbb-bsp-80-the- ... 5360444771

welshkev

superstar simple for me: http://www.superstarcomponents.com/en/s ... st-clamps/

The Rookie

I have a KCNC lightweight one, very nicely made and very light......less than half the weight of a Hope(less) and much more reliable, brass bush not plastic.

Chunkers1980

Dunno what the fuss is about Hope being crap.

My QR one is fine (bit lumpy maybe) but functions great, does have a brass clamp plate so must be lots of versions out there. Long lever, nice knarly knob but I only paid 8 quid - I can't fault it, like I say the only mark downs I'd give it is its RRP and bulk.

CitizenLee

Anyone got any evidence of the hopeless Hopes?

I just use a Nukeproof bolt clamp since getting a Reverb, but I've have 3 Hope QR clamps over the years and none of them have ever given me any problems, despite many, many offs.

The Rookie

I had a Hope, my previous QR had a silly alloy nut that eventually stripped it's thread, bought a Hope that was meant to be about 1 year old, bush snapped after about 3 uses which I replaced with one from a spare (wrong diameter) GT QR (older and less worn), it was OK, but nothing special and very heavy.

CitizenLee

All mine have had the brass bit, so probably why they lasted so long.

Chunkers1980

CitizenLee wrote:

All mine have had the brass bit, so probably why they lasted so long.

And what happens if you always get things used, you don't know who used them before - could have been a Rubez for example.

CitizenLee

One of them was used, from eBay... but you could say that about any used part, so you employ some common sense when buying used. Anyway, it was fully functional like the other two and as far as I know the guy who I sold my SX Trail frame too is still using it. I'd happily buy another if I needed QR again. I'm going to go with user error for those who are moaning they broke them.