Fantastic bike in excellent condition barely used over last two years. 17.5” frame (see photo) No flaws, couple of very minor marks Marlin 5 2018. Related Products. Trek Marlin 5 2018 29er. It’s one of the best-valued models from the Marlin series, offering multiple improvements compared to the lower-priced Marlin 4. Trek Marlin 5 2018 Mountain Bike Quality Score – 93%. With a quality score of 9.3, Trek Marlin 5 2018 Mountain Bike features as one of the highest ranking products in the Cycling category. This score is reached from a combination of product testing, customer reviews, expert reviews, brand reputation and 3rd party product tests. 3 years ago. Trek Marlin 5 Quick Overview. SUMMARY Marlin 5 is a trail-worthy daily rider that's perfectly suited for everyday adventures, on and off the trail. Click the button below to add the Trek Marlin 5 2018 Mountain Bike to your wish list. The Trek Marlin 5 and Roscoe 8 are both aluminum frame hardtail mountain bikes. Marlin 5 is characterized by an excellent off-road-ready aluminum frame, cushy front suspension, burly wheels and tires, hydraulic disc brakes and a lot more. Collection in person only. Trek Marlin 4 2018 Mountain Bike $250.00. The Marlin 5 has 27.5″ / 29″ wheels and higher gearing, while the Roscoe 8 has a dropper post, 27.5″ wheels, much better components, a better fork, and a bigger fork. Condition is Used. Trek Marlin 6 2018 Mountain Bike $324.00. I was thinking the same thing, but I've never seen anyone with that setup.. Trek Marlin 7 2016 Mountain Bike $263.00. Trek Marlin 5 2017 Mountain Bike $231.00. I'll buy some 2.5 minions and see if they work.