Bike size

My mate is 5ft 10.5ins with and inside leg measurement of 33ins he is looking to buy a Trek road bike what size frame would you recommend,
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Planet X RT58
Cannondale CAAD 10 2012.
Pain.. Is weakness leaving the body.
HATING LIFE-CYCLES FROM 2011
Planet X RT58
Cannondale CAAD 10 2012.
Pain.. Is weakness leaving the body.
HATING LIFE-CYCLES FROM 2011
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Planet X RT58
Cannondale CAAD 10 2012.
Pain.. Is weakness leaving the body.
HATING LIFE-CYCLES FROM 2011
Planet X RT58
Cannondale CAAD 10 2012.
Pain.. Is weakness leaving the body.
HATING LIFE-CYCLES FROM 2011
Scott CR1
It depends on what geometry, but that definitely sounds too big. He'd be a 54 by most sizing charts, perhaps a 56.
Planet X RT58
Cannondale CAAD 10 2012.
Pain.. Is weakness leaving the body.
HATING LIFE-CYCLES FROM 2011