GR 1600 SPLINE disc brake wheels, clincher 25 x 24 mm, 700c for Shimano Micro Spline*New version of the GR 1600's* GR 1600 SPLINE disc brake wheels, clincher 25 x 24 mm, 700c for Shimano Micro Spline When Cycling Tips reviewed the original GR 1600's they said that "Never in the past 18 months did these things ever feel less than amazing whenever I put them on a bike" Since then the DT's alloy gravel range has built an enviable reputation for superlative ride quality and bombproof backcountry reliability 24 mm inner width has proven