Trek Electra brand Bontrager brand Trek Travel
View our accessibility statement
  • TranzX JD-YSP39 34.9mm Dropper Seatpost

We’ll make this a great experience

It’s our mission to provide you with world-class hospitality every time you visit us online or in-store. We’ll always take care of you. It’s the Trek way.

Awesome free shipping options

All accessory orders over $49 ship to your home for free, and all accessory orders ship free to your local retailer for in-store pickup.

30-day Unconditional Guarantee

If for any reason you’re not 100% happy with your online order from trekbikes.com, you can return it in like-new condition within 30 days. No questions asked.

Learn more

TranzX JD-YSP39 34.9mm Dropper Seatpost

Model W1040852
$209.99 Comp. Value Sale price

Since 1992, TranzX has been a leader in the industry – recognized for excellent design, practicality of application and superior quality.

Confirm delivery options

Address details
  • Note: We do not offer delivery to PO boxes, hotels, and freight forwarding addresses. Bikes cannot be delivered to FPO/APO addresses due to size restrictions on deliveries.
Direct-to-home shipping

Get your most accurate shipping costs. We offer free ground (for orders over ), 2-day, and overnight shipping options.

Premium home delivery

Confirm you’re in the selected retailer’s delivery area.

Find a retailer

Pricing details

Retailer price

Retailer pricing applies when you purchase goods online that the shop has in stock today. Order is subject to retailer acceptance.

Comp. Value

Manufacturer’s Suggested Retail Price. This is the price you’ll pay ordering directly from Trek. Total price including shipping and taxes may be seen in the cart.

In-store pickup
Direct-to-home shipping

Genuine Replacement Parts

The TranzX adjustable seatpost equips air pressure actuation–freely and easily adapting your seat position according to the terrain you meet. The MICRO adjustment offers quick and easy seat positioning, with reliable and robust technology.

Product details

  1. Remote actuated dropper post with Stealth internal routing and a clean look
  2. 34.9mm clamp size, 2-bolt head, available in 3 lengths