How strongly 27.5" can assert itself alongside the two established size giants is unknown. But one thing is for certain: most bike manufacturers are already working on this size. 27.5-bikes combine the advantages of the 29er and 26" models- virtually the best of both worlds. They are quiet and more stable, roll as easily as a classic 26" and have better traction. At the same time they are also more agile and responsive than 29ers.