The new Sensor has good value, good initial reviews and seems to fit in perfectly next to other exciting new short travel 29ers like the SBG Transition Smuggler. Except for one important geo figure: bb height. Even in the low geo setting the Sensor bb is about 17mm higher than the Smuggler. This might be a welcome change for some with really rocky climbs or tall people who need to run 175mm cranks. It’s also a golden opportunity for those who like to experiment with wheel sizes, specifically mixed wheels sizes: 29 front 27.5 rear. I have played around with the reverse mullet a bit and really really liked it. You get the incredible 29er stability and traction you need through the bars and front end, but the snappy, playful rear 27.5ers are know for.
I started this thread hoping to get some input from knowledgeable ppl on this idea and maybe to inspire some others to try it. Correct me if I’m wrong: the overall wheel diameter difference between 29 and 27.5 is 38mm when running the same tires. If you run a 27.5+ that number goes down a bit. So you’re looking at a 19mm drop in the rear axle height, which will net about 10mm drop in bb height and -1 degree slackening of the hta and sta. The seat can be slid forward to help counteract the slacker sta, making the tt length a bit shorter.
Reverse mullet GT Sensor geo changes:
64.5 hta
75 sta
346 bb height
Sounds like a pretty incredible trail bike to me. I’m in the market for a bike like this and just might pull the trigger when frame sets become available next month.
I started this thread hoping to get some input from knowledgeable ppl on this idea and maybe to inspire some others to try it. Correct me if I’m wrong: the overall wheel diameter difference between 29 and 27.5 is 38mm when running the same tires. If you run a 27.5+ that number goes down a bit. So you’re looking at a 19mm drop in the rear axle height, which will net about 10mm drop in bb height and -1 degree slackening of the hta and sta. The seat can be slid forward to help counteract the slacker sta, making the tt length a bit shorter.
Reverse mullet GT Sensor geo changes:
64.5 hta
75 sta
346 bb height
Sounds like a pretty incredible trail bike to me. I’m in the market for a bike like this and just might pull the trigger when frame sets become available next month.