![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 TREK MARLIN 4 GEN 2 SIZE LARGE BLACK 2023 MOUNTAIN BIKE HARD TAIL 29" Mountain Bike Lifecycles Leeds Bike Shop Trek TREK MARLIN 4 GEN 2 SIZE LARGE BLACK 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-ml-black-2023-mountain-bike-hard-tail-29-703382_2048x.webp?v=1702226703)
Trek TREK MARLIN 4 GEN 2 SIZE LARGE BLACK 2023 MOUNTAIN BIKE HARD TAIL 29" Mountain Bike Lifecycles Leeds Bike Shop
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