ControlTech CLS MTB 6061 Seatpost

Price Match
Ask a question
Select a size
Add to Basket

Product Description

Product Details:

  • Lightweight, comfortable and stiff aluminium seatpost that will improve your cycling performance and enjoyment
  • The CLS Offset Seatpost is constructed from 6061 aluminium, proven to increase strength without adding weight, maximizing the effect of your power output. It’s also extremely durable so will stand up to all-year riding
  • It’s offset by 10mm, so you have greater flexibility in adjusting your bike position to suit your current frame
  • Long-lasting stainless-steel bolts will keep your seatpost firmly clamped to your saddle
  • Comes in 27.2mm and 31.6mm diameters to suit a wide range of seat-tubes
  • The CLS Offset Seatpost weighs just 285g

    Key Features:

  • Made for road racing, sportive riding and cyclocross
  • Material: 6061 aluminum
  • Seatpost Bolt Material: Stainless steel
  • Seatpost Length: 350mm
  • Seatpost Diameter: 27.2/31.6mm
  • Offset: 10mm
  • Weight: 285g (350mm, 27.2mm option)

    Reliability: Controltech USA knows the combination of sound engineering and high-quality materials practically guarantees the lifelong performance you expect. They never compromise our designs at the expense of low-quality materials. They use only premium grade raw material of aerospace quality.

    Ingenuity: Controltech is, and always has been, a global leader in component design. The state-of-the-art manufacturing technology would be nothing without the cutting-edge innovation of our Global Research & Development Team.

    Quality: A precise, unflinching view of manufacturing tolerances and meticulous craftsmanship are the hallmarks of Controltech components. Craftsman-level alloy welding and carbon layup are hallmarks of our designs. Plus of course, the use only premium-grade raw materials in the first place.

    Value: Though the greatest innovation takes place on the cutting edge of material science, manufacturing processes and product design, there’s such a thing as ’trickle down.’ Today’s no-expense-spared prototype is tomorrow’s easily-obtained standard. ControlTech work hard to create a range that covers every riding style, every rider and every budget – without ever sacrificing class-leading performance.

Occasionally, without notice, manufacturers change product design and/or specifications.

Reviews and Q&As disabled

Customer reviews and Q&As are disabled because you declined functional cookies.

To enable reviews and Q&As click the 'Cookie Settings' button below and enable functional cookies.

Seatposts Guide


Seatpost Guide

A seatpost is the part that connects your saddle to your bicycle frame. The seatpost is designed to fit perfectly inside the seat tube of the bike, there are various sizes available, the size must match the seat tube exactly. The top of the seatpost has an included part known as the saddle clamp that clamps around the rails of the saddle and allows forward and back adjustment of the saddle along with saddle angle adjustment.

You might see there are various sizes of seatpost available, for example, 27.2 x 400.
This refers to the diameter of the seatpost and the overall length. The diameter must be exactly as intended for your bike, if you are unsure what size you need, it should be stamped or written on the old post. If the size is not shown, the manufacturer's specifications should show what size is needed.
The length is often more than needed, but check the total length of your existing seatpost to check what length is needed. Some riders with small frames might need to cut the post shorter to lower the seat to the correct height.

Please note the minimum insertion mark that shows the minimum amount of post that must remain inside the bike for safety reasons.

Rigid Seatposts

A rigid seatpost is the tube that slides up and down inside the seat tube of the frame allowing you to adjust the height of the saddle for different leg lengths. A rigid post is the lightest type of seat post and is seen on the majority of bikes. There are various sizes available to suit different frames and can be made from aluminium, titanium or carbon fibre.

Seatposts can be available in different lengths to suit riders who need a lot or not so much extending out of the frame. The top section near the saddle clamp can also have a setback, where the saddle clamp is offset to the back of the bike or they can be straight to suit the different fit and reach preferences.


Shop Rigid Seatposts
Rigid seatpost

Dropper Seatposts

Dropper seat posts let you adjust the height of the saddle easily while riding. A relatively new addition from the world of mountain biking, the dropper seatpost is now seen as an essential addition to any mountain bike. Having the saddle at the correct height for pedalling efficiency is great until the terrain changes and you need to drop the saddle out of the way so you can move your body weight around without the saddle being in the way.

A cable or hydraulic hose feeds from the post up to a remote actuator on the handlebars. Some frames support internal routing for this cable/hose, known as internal or stealth routing. Other frames only support external routing, there are also externally routed dropper posts for these frames. The standard seatpost diameters apply, along with the different lengths. Dropper posts are also available in different amounts of drop to cater for different leg lengths.


Shop Dropper Seatposts
Dropper seatpost

Suspension Seatposts

Suspension seatposts can look like dropper posts but instead of dropping out of the way with the press of a lever, they remain at maximum extension until you ride over a bump. A suspension seatpost with have a certain amount of travel to tame a bumpy road and make cycling more comfortable. They are sprung by air, coil or with an elastomer.

The same variables apply to suspension posts as to other types. They are available in different diameters to suit different frames, and different lengths to suit different leg length.


Shop Suspension Seatposts
Suspension seatpost

Seat Clamps

The seat clamp is the part that secures the seatpost in the frame to stop it from moving. They are made in different sizes to suit different frames. The size of seat clamp is not the same as the size of the seatpost. The seat clamp will always be a larger diameter than the seatpost to cater for the thickness of the frame.

There are quick-release seat clamps that give tool-free adjustment. Standard bolted seat clamps and even ones that include mounts for a rear rack or a guide for an externally routed dropper seatpost.


Shop Seat Clamps
Seat clamp

Delivery & Guarantee

UK Delivery Information

International Deliveries – Temporarily Suspended 11/11/20

Note: We are still offering deliveries to the Isle of Man, Scottish Highlands, Scottish Islands, Channel Islands, Isle of Wight, Jersey and Guernsey. 

Courier Delivery update: Due to the COVID19 situation, we are currently experiencing some delays with deliveries. Our couriers are working around the clock to get your order to you as soon as possible but there is a potential delay of up to 48 hours . Please check your tracking on track your order here.

Please download the TNT Track and Trace App for iOS here and Android here so you can keep an eye on your delivery and any further updates.

Please note on the TNT tracking app it may show your delivery status as ‘Collecting’ (as per image below). This means your delivery has left our warehouse and is currently held at TNT main depot and there could be up to a 48 hour delay.

tnt delivery

Please keep checking the TNT tracking for further updates. On behalf of TNT we apologise for any delay and inconvenience this may cause. 

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

Click here for more UK and international delivery information.

Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns. 

We will give you a full refund on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.