Ibis Tranny XT

As the name implies, this gorgeous frame is capable of transformation. (No, nothing to do with women’s clothes.) It’s a lightweight race bike for riders who want pure speed without the weight or maintenance penalties of rear suspension. For those who want even less mechanical worry, the hinged rear triangle can be elongated to tension the chain for a single-speed conversion (hence Tranny). Our testers also loved the updated, race-specific RockShox Sid Team fork, which offered much more predict­able steering than earlier versions of the Sid. Bonus: The rear triangle can be completely removed for easy bike packing. $3,860; 23.3 lbs (17″); ibiscycles.com