Pad Y: 64 cm
Pad X: 52.5 cm This is to center of pad.
Can't wait to hear what you have to say!
Good on ya for staying diligent with your fit coordinates.
For the 2018 Speedmax SLX you can go one of two ways....
1) Medium with the flat bar, long stem, a single 60mm spacer + two 5mm spacers and pads dead center.
2) Large with flat bar, short stem a single 20mm spacer + three 3mm spacers and pads dead center.
There's no wrong choice here, I can't even make an argument for a better choice - you have the wonderful freedom of choose based on availability.
For the 2019 Speedmax SLX you can go one of two ways...
1) Medium with either flat or rise bar*, short stem, 45mm of spacer^ and pads pushed forward not to the max but darn close.
2) Large with flat or rise bar*, short stem, 10mm of spacer^ and pads nearly dead center.
*on the new bike there are only two options for the base bar: flat or rise (no drop version in 2019), and the base bar no longer effects the spacer height so flat or rise you still need 45mm of spacer with the M and 10mm of spacer with the large.
^on the new bike there's a mess of 5 and 10 mm spacers and they just get stacked up to achieve the height needed. No longer is there a need to purchase an aftermarket 60mm or deal with a 20 and some combo of 5s.
Now, what way would I lean on the 2019 bike....availability is a legit issue here so that's a factor and I think either size is great. I might prefer the large for one simple reason - it comes stock with the flat bar and I'd rather not have 45mm of elevation difference betwixt my aero extensions and my brake levers. I want those closer - as a triathlete, if I was 100% time trial then okay, maybe. Then again, I could get the M, pay a bit extra for the rise bar and have less gap but then I like the aesthetic of the flat bar so there's my own personal snobbery with which to contend as well. Oh, decisions!
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Twitter - @TriCoachIan