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Free UK Shipping Over £50 & Easy Returns





Free UK standard shipping on orders over £50
Experience the perfect blend of lightweight design and reliable performance with the Pro Tharsis Dropper 100mm Dropper. Crafted for riders who demand both precision and durability, this dropper seatpost offers 100mm of infinite-stop travel, allowing you to adjust your saddle height effortlessly on the trail. Its internal cable routing ensures a clean, sleek look while protecting cables from dirt and damage, enhancing longevity.
Available in three diameters—27.2mm, 30.9mm, and 31.6mm—the Tharsis Dropper features advanced 3D forged constructions tailored to each size for optimal strength and weight savings. The 27.2mm model impresses with an AL6061 alloy lower, AL7050 alloy shaft, and titanium bolts, achieving an ultra-lightweight 405g. Meanwhile, larger sizes use AL7075 lowers combined with AL7050 shafts for a robust feel without excess weight.
Additional refinements like the new 2-bolt saddle clamp reduce weight by 45g, complemented by an oval shaft and improved collar design that save another 25g. Whether you're upgrading your bike or building from scratch, the Pro Tharsis Dropper ensures smooth, responsive height adjustments for enhanced control and comfort on every ride.
Is the lever included with the seatpost?
The lever is not included and must be purchased separately as either Universal (PRSAC0212) or LH (PRSAC0211).
Can I use this dropper seatpost on any bike?
It fits frames designed for 27.2mm, 30.9mm, or 31.6mm seatposts. Ensure your frame supports one of these diameters before purchasing.
Stock Status Instock - Instore - Item Usually shipped or available for shop collection, within 48 hours (Mon-Fri)
Instock - Supplier Warehouse - Item is held in Suppliers Warehouse, Depending on the the supplier transfer time can vary from 24 Hours to 14 Days for item held in European warehouse.
(over festive periods some suppliers shut from 24th Dec-2nd Jan so orders can be delayed through this period.)
Brands held in European website include Trek, Bontrager, Electra, Wahoo, Rapha. For up-to-date transfer times please call customer services on +44 (0)1782 768622
Most out products are shipped by FedEx, providing unprecedented reliability and speed. Lightweight Spares below £25.00 value have a Royal Mail postage option, which is sent via Tracked 48 service. - £2.99
Shipping on all Domestic Orders over £50.00 (excluding bikes and home trainers) for delivery within the UK is completely FREE!
Bike and Home Trainers and oversize Goods £15.00 - FedEx
White Glove Bike Delivery - our white glove option has your bike personally delivered to you by a fully trained Mechanic and Bike fitter - £99.99
(Certain bikes will only have this option such as Cargo Bikes)
To Qualify for FREE Shipping:
In some cases, we may ship items out with another courier, depending on the status and availability of items ordered. (Customers will not be charged more and will be refunded any unused postage cost) If part of an order is cancelled and the total drops below the £50.00 free postage, a postage charge may be taken.
Delivery costs will be clearly stated on the checkout page, though you will need to register (to provide your delivery address) in order to see the delivery costs.
If you have any questions about delivery charges, times or none delivery please do not hesitate to get in touch by email:store@swinnertoncycles.co.uk or by telephone on +44 (0)1782 768622. Handling is normally 48 hours, but at busy periods this may be extended but we will endeavor to process your order within 5 working days. Please bear in mind in some cases orders can take longer to process, please contact us for more details.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.






