Marin Bolinas Ridge 1 & 2
Here’s are some nice starter mountain bikes for teens and adults.
These are Marin’s Bolinas Ridge models. They’re nice entry-level hardtail mountain bikes equipped with disc brakes, Shimano drivetrains (Tourney and Acera), and Suntour suspension forks with 100mm of travel (the Bolinas Ridge 2 has a suspension lockout on it).
The Bolinas Ridge models happen to roll on top of 27.5 inch wheels. The 26” wheel size was the mountain bike standard for over 30 years but now most off-road rigs are now using 27.5” or 29” wheels for the improved traction and ability to roll over large obstacles.
With these bikes you get a broad size range. With the extra small 13″ frame size rolling around on top of 27.5″ wheels you‘ll get nimble handling, good comfort and decent standover clearance for folks in the 4’9″ to 5’1″ height range. The small to medium sizes are still easy to handle for people just over 5’ tall, and can provide some room to grow up to 5’7” or so.
Bigger sizes are also available (of course) in both versions. We generally advise larger adult riders to grab the Bolinas Ridge 2 or make the step up to more expensive bike models that will provide greater long-term durability.