The Mx version came with 200 i2i. the sl came with 190 x45mm i2i. depends on the fork you are running. the MX came with 140 i believe? the Sl 120mm (i have one)

They are great frames i have an SL built up with a 190mm shock and 130mm forks it is a sweet ride...

i have tried the prophet with the following mostly in FR: (i rarely use Xc. this is my preference )

190mm x 45mm with 160/140/130/120mm forks. i found the tyre can rub the seat tube if totally bottomed out in FR mode. This seems to increase in occurrence as you increase the fork size. the HA also slackens as the crown to axel of the fork increases. with 160 forks the BB is way tooo low.

200mm x 50mm with a 140/160mm fork. this is the shock this frame was designed for. with this length of fork as you would expect the geometry is spot on.

200mmx 57mm with a 160mm fork. in FR the tyre fouls the seat tube.

216 x 63mm (only fits in XC) BB is too high.

just what i found. feel free to disagree.

the Mx is best in FR with a140/160mm fork and a 200mmx 50mm shock. This is how i have run this frame.

the SL is best with a 130mm fork and a 190 x 45 shock in FR. this is how i run mine anyhow and with a 40mm stem it is a great UK trail bike and jumps well too. the BB in my opion is about as low as you would like it and with 175mm cranks you do get the odd pedal strike.

 Yea and it was OK. The Tyre issue only occurs in FR with larger tyres. witha 2.1 panaracer trailblazer it was fine, but with a maxxis 2.35 ignitor or bigger the tyre buzzes the seat tube under full compression.

 supposed to have a 190mm shock on it... would you sell it without a shock ??

 did you try the 200x57 in XC mode?