The TRANZX SP39J gives riders on 34.9mm-seat-tube frames access to a quality hydraulic dropper without needing an oversized shim adapter — a straightforward solution for older or specific MTB platforms.

  • 34.9mm diameter — direct fit for frames with larger seat tube bores
  • 150mm travel — ample drop for trail and enduro riding
  • Internal cable routing for a tidy cockpit
  • Remote up/down lever included in the box
  • 458mm total length suits medium to large frames

The SP39J uses hydraulic cartridge actuation for consistent performance and is straightforward to service. The included lever is compatible with standard MTB handlebars.

Compatible with frames accepting a 34.9mm seatpost and internal dropper cable routing. Total length 458mm — confirm minimum insertion depth for your frame before purchasing.

Warranty claims for this product should be directed to Tune Cycles. Return the item to us with proof of purchase and we will manage the warranty process with the brand on your behalf.
  • 34.9mm diameter suits older MTB frames and specific bikes with larger seat tube bores
  • 150mm travel delivers confident saddle drop for technical descending
  • Internal cable routing keeps your cockpit clean and cables protected
  • Up/down remote lever included — no need to purchase separately
  • 458mm total length suits medium to large frames
  • Hydraulic actuation for smooth, repeatable saddle movement
SpecificationValue
Diameter34.9mm
Travel150mm
Total Length458mm
Cable RoutingInternal
LeverUp/Down remote lever included
SKU KWT-JD-SP39J-349-150
Barcode # 669356791170
Brand TRANZX

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