Like this site? Help us to make it better.

Aerozine Ultralight Seat Post Clamp



Weight weeny seatclamp available in loads of colours and two sizes

At every product is thoroughly tested for as long as it takes to get a proper insight into how well it works. Our reviewers are experienced cyclists that we trust to be objective. While we strive to ensure that opinions expressed are backed up by facts, reviews are by their nature an informed opinion, not a definitive verdict. We don't intentionally try to break anything (except locks) but we do try to look for weak points in any design. The overall score is not just an average of the other scores: it reflects both a product's function and value – with value determined by how a product compares with items of similar spec, quality, and price.

What the scores mean

Good scores are more common than bad, because fortunately good products are more common than bad.

  • Exceptional
  • Excellent
  • Very Good
  • Good
  • Quite good
  • Average
  • Not so good
  • Poor
  • Bad
  • Appalling

Carrying on the anodised colour coding of their other components this XSC1.0 seatclamp from Aerozine is about as minimal as you get. One for the weight weenies.

The XSC1.0 is machined from 7075 alloy which removes about as much material as possible to still allow it to do its job. What's left weighs just 8g.

It comes in the two most common seat tube diameters of 31.8mm and 34.9mm. Providing you haven't got too thick a paintjob it'll slip on snugly, stopping as the internal lip rests on top of the tube.

Plenty of material has been left around the bolt area to resist cracking from loosening and tightening though you don't have to apply too much torque as the clamp provides plenty of pressure for the seatpost and frame interaction.

It's priced at £15.99 which can be considered expensive when you can get cheap cast clamps for a few quid but up against other super light machined clamps it's about on the money.

Overall the Aerozine XSC1.0 is a neat finishing product for customising your frame. It looks good and fits well and on the whole is priced well too. The option of eight various colours means one should match your bike too.


Weight-weenie seatclamp available in loads of colours and two sizes

If you're thinking of buying this product using a cashback deal why not use the Top Cashback page and get some top cashback while helping to support your favourite independent cycling website test report

Make and model: Aerozine Ultralight Seat Post Clamps

Size tested: 31.8mm

Tell us what the product is for, and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?

The XSC1.0 seatclamp is intended for road racing, XC and All Mountain and it certainly feels strong enough for all kinds of applications. Overall though its a nice finishing touch to a frame.

Tell us some more about the technical aspects of the product?

Material: 7075 Alloy CNC Machined

Dia: 31.8mm, 34.9mm

Weight: (incl. bolt) 8.0g

Finish: Black, Silver, Blue, Pink, Red, Gold, Orange, Green

Rate the product for quality of construction:
Rate the product for performance:
Rate the product for durability:
Rate the product for weight, if applicable:
Rate the product for value:

Tell us how the product performed overall when used for its designed purpose

It looks great and fits well providing plenty of grip.

Tell us what you particularly liked about the product

The machined minimalistic look

Tell us what you particularly disliked about the product

The similar Planet X version is just a tenner, not as many colours though

Did you enjoy using the product? Yes.

Would you consider buying the product? Yes.

Would you recommend the product to a friend? Yes.

Anything further to say about the product in conclusion?

It certainly finishes off a frame nicely and works with the rest of the Aerozine range.

Overall rating: 7/10

About the tester

Age: 36  Height: 180cm  Weight: 76kg

I usually ride: Kinesis T2  My best bike is: Kinesis Aithien

I've been riding for: 10-20 years  I ride: Every day  I would class myself as: Expert

I regularly do the following types of riding: time trialling, commuting, club rides, sportives, fixed/singlespeed,


As part of the Tech Hub here at F-At Digital, our senior product reviewer Stu uses the knowledge gained from putting well over a 1,000 products through their paces (including hundreds of bikes) to write in-depth reviews of a huge range of kit. After first throwing his leg over a race bike back in 2000, Stu's ridden more than 160,000 miles on road, time-trial, track, and gravel bikes, and while he's put his racing days behind him he still likes to smash the pedals rather than take things easy. Although, as he spends a fair bit of his time reviewing ebikes these days he's becoming an expert in letting the motor take the strain. He's also waiting for 23mm race tyres to make a comeback!

Add new comment


BehindTheBikesheds | 6 years ago

i have the 'superlight' Token clamp, 13.5g, I've not found any issues as yet after a year, I weigh 100kg and ride with gusto shall we say. Wanting to use something like this with bugger all meat is silly IMO.

froze | 6 years ago

I agree with some of the others, those weight weenie clamps are pure crap, they're too fragile to actually be serious about clamping. I bought one of those against my better judgement and it broke too, much better off getting a heavier stainless steel, or an AL collar with a stainless insert and bolt instead and deal with the extra 20 or so grams.

RoboRider21 | 8 years ago

I have one of these, hope im not going to have a similar problem to lisa76uk.

Have a red one which looks killer on my black & red bike, been on for 20 months so feel ive had my £16 worth.

Their ceramic bottom bracket is fantastic value at £45 as well, also popped that on my steed in glorious red.

lisa76uk | 8 years ago
Nick T wrote:

Your main mistake there was in thinking you were supposed to actually ride around on this, rather than only putting it on for the picture of your bike hanging from a scale.

Ha! yeah, I know, it did look good while it lasted though  16

Nick T | 8 years ago

Your main mistake there was in thinking you were supposed to actually ride around on this, rather than only putting it on for the picture of your bike hanging from a scale.

lisa76uk | 8 years ago

Weird. I fitted one of these in March last year. My seatpost starting slipping recently, not by much, but enough to be annoying. I had a look yesterday and found it had cracked (see attachment). It had always been torqued to 6Nm which is within tolerance of the clamp and my carbon seatpost.

Chris James | 8 years ago

I wonder how much a normal £3 clamp weighs? 25/30g?

dodgy | 8 years ago

Probably ok if your seatpost is a perfect snug fit in your frame. If the frame is reamed slightly too big, or seatpost slightly undersized, this clamp doesn't look beefy enough to secure it.

I just went through the same problem on a Tripster ATR, only thing that sorted it was a Salsa Lip-Lock

Latest Comments