The 2017 Trek Powerfly FS 7 Mountain bike has a 27.5 inch frame and is powered by a Bosch motor. It has been lightly used and well-maintained with only 3,241 miles on the motor, so the battery should be in good shape. Tires were replaced. Comes with a Bontrager R Helmet, original manuals from Trek and Bosch, and a CD with a comprehensive owners manual. Original cost $5,559 (we have receipts). $1,800 (reduced) cash or best offer. Easy pickup in Sausalito.