TranzX YSI34 Dropper Seatpost - 30.9mm - Internal - Stealth - 150mm - 465mm - 1x Remote - 22.2mm Bar Clamp Images Uploaded - Ready for Review and the straight parallelogram design

and the straight parallelogram design means there's no debris or conditions that can put this derailleur into the rear wheel

If you are upgrading to an 11-speed drivetrain

Additional Features- BOA® Li2 dial featuring incremental micro-adjustability and a sleek lightweight design

They look super tough too

TranzX YSI34 Dropper Seatpost - 30.9mm - Internal - Stealth - 150mm - 465mm - 1x Remote - 22.2mm Bar Clamp Images Uploaded - Ready for Review and the straight parallelogram designExceptional value and quality dropper post in 34. 9 optimised size. Alloy #6061. Specifications Material: Alloy #6061 Offset: 0 mm Diameter: 34. 9mm Length 349 mm Travel 100 mm (34. 9 mm) 399 mm Travel 125 mm (34. 9 mm) 456 mm Travel 150 mm (34. 9 mm) 496 mm Travel 170 mm (34. 9 mm) 556 mm Travel 200 mm (34. 9 mm) Weight 493 g 34. 9 * 349 mm 524 g 34. 9 * 399 mm 599 g 34. 9 * 456 mm 633 g 34. 9 * 496 mm 685 g 34. 9 * 556 mm (excluding cable set 90 g)