Waiting for the answer now.
I ride an MTB with 27" riser bars- In Fact I ride two as the Tadem also has wide bars. On an MTB-Wide bars will give you control once you get used to them and I am currently riding 42's on the road bike. I am quite small but I do feel that a wider bar would give me more bike control.
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How long was I in the army? Five foot seven.
Spike Milligan