I am currently on a PX Stealth (Small), at 79 degrees (with Adamo), 100mm stem, no spacers, VT cockpit, 100deg hip angle, ~150deg knee angle - thus happy with my fit. I’m low in the front, *feels *fast and I run ~well off the bike (compared to the non-ST community). I use twin H3’s and typically take about 61 minutes in windy-rolling Ohio 40K bike segments. With no drag data available for the Stealth, I am just wondering if anyone knows what I’m leaving on the table versus dropping $1800 on a Transition Pro frameset? I am typically top 5 AG with this bike…but it sure would be nice not to have to run down the local AG’s in order be there at the end.
If your one of those “every 1/10th of a second counts” people with some money to burn, then sure. Whatever floats your boat. If not, keep your cash and spend it on strippers and blow…
I personally would want to substantiate the differences. I cant believe you will see a difference outside of a placebo.
I would love to substantiate the differences, just wondered if it had been done and I just missed it. If we were talking a minute or two over a 40K, I might part with the cash. Less than that I will just have to HTFU. Being somewhat of a math nerd, the absence of data leaves a bad taste if you know what I mean. I guess we will have to wait for the Exocet to launch in the hopes that PX tests their brand loyalty and tries to tap into the upgrade-ready crowd by posting comparative drag data between their products.
I personally would want to substantiate the differences. I cant believe you will see a difference outside of a placebo.
I would love to substantiate the differences, just wondered if it had been done and I just missed it. If we were talking a minute or two over a 40K, I might part with the cash. Less than that I will just have to HTFU. Being somewhat of a math nerd, the absence of data leaves a bad taste if you know what I mean. I guess we will have to wait for the Exocet to launch in the hopes that PX tests their brand loyalty and tries to tap into the upgrade-ready crowd by posting comparative drag data between their products.
I think you are probably talking about 1 minute in a 40k on the table.
Just to give you an idea, the Planet X has very similar tube shapes and sizes to the Kuota Kalibur (each has a downtube of about 70mmx38mm; a headtube about 45mm wide and aero seatstays and seattube) which tested about 150 grams of drag higher than the P3C depending on yaw.
The Specialized transition tests about on par with the P3C depending on the exact data set you are looking at.
Steve Hed’s rule of thumb is 3 seconds/ 40 km for every 10 grams of drag. So 45 seconds difference between the very comparably designed Kalibur and the Transition.
Whether that minute is worth $1800 to you, only you can decide. However, it is REAL, the data on bike design is clear. Even though the PX hasn’t been tested, I really doubt it defies all the other data that has been released which shows a real correlation between small front area, deep tubes and speed.
All that said, I too am curious to see data on the exocet.
As I’ve posted elsewhere on ST, I’ve had one on order for a while now … and according to my LBS, it there are no T-Pro framesets available anywhere for the foreseeable future. So my deposit might roll to a 2011 Transition … unless I get so impatient I spend another few hundies to get a P3C frameset. Those are apparently much easier to come by.