Those are 29+ rims, not 29. Similar to 27.5+, the tires that fit on those rims will be larger in volume than standard 29. Most bikes will not fit them, it's generally some fat bikes and some purpose built mountain bikes that have them. First of all, make sure you can fit 29ers on your bike. That’s because all mountain bikes came with standard 26 in. wheels. Then, along came two wheel sizes that have, for the most part, overtaken 26 in. wheels. First on the scene were 29 in. wheels (29ers), followed a few years later by 27.5 in. (also known as 650b) wheels. How much wider? 2.7-3.0in about covers it. They usually sit on wider rims too, 40-50mm internal width to allow the wider tyre to spread out properly and form the optimal shape. Those 27.5in Plus tyres near enough match up in external diameter to 29in tyres, which means some bike companies let you switch between the two wheel sizes. Best Priced E-Bike: Specialized Turbo Tero 3.0 $3,250 $1,999. Best Winter Special: State Bicycle Co. 6061 Trail+ Fat Bike $999. Best Budget Hardtail: Specialized Rockhopper Elite 29 $1,150. Best With French measurements and mountain bike tires, all you really need to know is that 650B = 27.5″ and 700C = 29″. There are French sizes for variants of the 26″ wheel; however, the most common 26″ wheel, which is denoted by 26×1.0, or 559mm BSD, does not have a designated French size. For more detail checkout our other articles "26 or 29 You Choose" and "An introduction to 650b". Of interest in this table is the N/A under 29" for Gravity. This is quite simply because the 29er hasn't really been used in this area yet. Also the only "POOR" is under 27.5" for Availability - this is because new bike shops are not really stocking Mullet ready – comes in either 27.5″ or 29er. MSRP: $2999. The Chameleon R carbon c model is a lightweight, speedy, and stylish mountain bike with compatibility for 27.5-inch, 29-inch, or mixed wheels. This hardtail bike uses FOX Rhythm 34, 120mm travel fork suspension, and a large front wheel to provide great shock absorption and rollover Not much difference between 26 and 27.5”. Just 25mm or 1 inch difference in diameter between the 2 wheel sizes. I would go with the bike you can get now. For some perspective, a 2” wide 27.5” tire will have the same diameter as a 2.5” wide 26” tire. “I fear the day technology will surpass our human interaction. A 27.5er will be way more agile than a 29er. I have both and I take the 27.5er way more often to trails than my 29er. For long straight rail trips a 29er is better but that's pretty rare. I would choose a 27.5er in the city as well for a commuter and on the trail as well. 29ers - cover more ground in the same revolutions as a 650B (27.5). Better for long single track and big elevation changes. 27.5 - great for hard turning dirt action. It's a lot easier to maneuver the smaller diameter wheels. My boys back east who ride steep wooded trails aware by 27.5's. Zwll.