The santa cruz highball c r1 xc 29er hardtail mountain bike 2017 is now available in 29rdquo and 275rdquo santa cruztried to keep the handling characteristics the same between the two bikes and let the wheel sizersquos traits shine through one difference ndashthe 275rdquo version has a size small while the 29er does not and that the 29er has an xxl while the 275rdquo does not on the 29er the chainstays have been shortened by almost a half inch and the