![Trek TREK MARLIN 4 GEN 2 SIZE XL BLUE 2023 MOUNTAIN BIKE HARD TAIL 29" Mountain Bike Lifecycles Leeds Bike Shop Trek TREK MARLIN 4 GEN 2 SIZE XL BLUE 2023 MOUNTAIN BIKE HARD TAIL 29" Mountain Bike Lifecycles Leeds Bike Shop](https://lifecyclesleeds.co.uk/cdn/shop/products/trek-marlin-4-gen-2-size-xl-blue-2023-mountain-bike-hard-tail-29-846145_2048x.webp?v=1702140223)
Trek TREK MARLIN 4 GEN 2 SIZE XL BLUE 2023 MOUNTAIN BIKE HARD TAIL 29" Mountain Bike Lifecycles Leeds Bike Shop
![It's been around two weeks since I bought Trek Marlin 4, 2021 and I freakin' love it. I'd like to change transmission (from 3-7 to 1-12 or 14), so what components will It's been around two weeks since I bought Trek Marlin 4, 2021 and I freakin' love it. I'd like to change transmission (from 3-7 to 1-12 or 14), so what components will](https://i.redd.it/8scwy0libxcb1.jpg)
It's been around two weeks since I bought Trek Marlin 4, 2021 and I freakin' love it. I'd like to change transmission (from 3-7 to 1-12 or 14), so what components will
![TREK Marlin 4 Gen 2 2024 :: £499.00 :: Bikes :: Children's Bikes - 26 and 27.5" Wheel :: Ken Ellerker Cycles TREK Marlin 4 Gen 2 2024 :: £499.00 :: Bikes :: Children's Bikes - 26 and 27.5" Wheel :: Ken Ellerker Cycles](https://www.kenellerkercycles.co.uk/smsimg/88/5299-0-full-marlin_4_coral_portrait-88.jpg)