For about $99 I was able perform 7 upgrades on Trek Marlin: Handlebar Riser, Seat, Kickstand, Waster Bottle Holder, Bell, Mudguards & Mobile Phone Holder. All the Products fit on Gen 2 & Gen 3 Trek Marlin 3, 5, 6, 7 & etc. Amazon Link to all products used: https://amzn.to/4bNGezW