I reckon it’s going to increase the bending moment on the head tube by about 6 and a bit percent. So I’m not too worried about the head tube breaking off – I’d hope someone 6 and a bit percent heavier than me could ride it OK.
What are people’s thoughts on the handling effect of it? I reckon 1.8 degrees difference (ignoring extra sag), which I don’t think I’ll waste sleep on. Should I waste sleep on it? 66 and a bit degrees is pretty slack for a 29er, and the BB will be a bit higher…
Basically I fancy a set of Yaris, it’s over £100 more for the 120mm travel than the 150mm ones, and as far as I can see no replacement air shafts are available yet to put them down to 120mm. I don’t think I’ll mind the extra travel, except perhaps the increased height of the bars (better budget for some flat bars I guess). The 150mm ones might be more versatile if I get a new frame at some point in the future, too.