|Speedplay X-1 vs X-3 pedals FYI||JimP|
Jan 14, 2002 11:23 AM
|I recently installed a pair of Speedplay X-3 pedals to replace an old pair of DuraAce pedals on the wind trainer bike since I have been happy with the X-1s on my road bike for the last 2 years. I also have an older pair of shoes that I wear on the wind trainer and installed the old cleats on them and the new cleats on the good Carnacs. While adjusting the cleats on the shoes, I wore the Carnacs on the wind trainer and noticed that my feet were quite a distance from the cranks. After measurement, I found that the X-3 pedals are about 3/16 inch longer than the X-1s. I guess I will have to keep 2 sets of shoes for this setup.|
Jan 14, 2002 3:06 PM
|The X/2's and X/3's are longer spindles. Maybe the Ti X/1's need to be shorter because Ti is weaker.
Jan 15, 2002 5:27 AM
|Good thought, I hadn't thought about that aspect. I guess I need to loose a couple of pounds before spring so I don't stress the titanium spindles too much.|
|Ti = weaker= BS!!||str8dum1|
Jan 16, 2002 7:18 AM
|the spindle is shorter to make a lighter pedal they can advertise. I have to take my X1s off in the winter and use my X3s so my booties dont rub.
why 2 sets of shoes? just move the cleat over.
|Ti = steel?||Dog|
Jan 16, 2002 7:44 AM
|Are you saying Ti is as strong as steel? That's not what I've read.
But, you may well be right about Speedplay's reason for the short Ti spindle, that is, simply to make a lighter pedal. However, why would they not make a steel version shorter, too?
|Ti = steel?||tr|
Jan 16, 2002 7:52 PM
|You're right, ti is significantly softer. I wouldn't consider myself conservative and i wouldn't use a ti spindle. I would rather use a carbon steerer than a ti spindle.|
|Ti = weaker= BS!!||gtx|
Jan 16, 2002 8:40 AM
|so then why do they put a weight limit of 185 on their ti spindle pedals and not on their steel spindle pedals?|
|Ti more flexable than Steel = no BS||Nessism|
Jan 16, 2002 1:17 PM
|It very well may be that the Ti and Steel materials used for the axles are the same strength. They are not the same stiffness however. The modulus of elasticity for Ti is approximately 1/3 lower than steel. This results in the Ti axle being more flexable than the steel counterpart. If the axle flexes too much, the bearings will bind and the pedal body may be damaged. Also, the rider may notice that the pedal is bending downward. Not good.|
Jan 17, 2002 10:04 AM
|Speedplay uses a shorter axle on the X-1 than on the X-3 because they believe that the people who buy the X-1 are racer types who prefer a shorter spindle, and X-3 buyers are recreationalists who prefer a longer spindle. However, they stock three different spindle lengths, and if you so desire, you can get any of their pedals in any of the three lengths. If you really want to drop some coin, they'll even make a custom length for you.|
Jan 17, 2002 11:49 AM
|as usual, you came through with the best info. Does this mean I can get shorter spindles for my Frogs and lower my Q-factor? Hmmmm, I have to look into this...|
|I'm quite sure you can...||TJeanloz|
Jan 17, 2002 3:35 PM
|I'm fairly certain you can get shorter axles for your Frogs- I'm pretty sure it uses the same spindle as the X series.|
Jan 17, 2002 3:59 PM
|as soon as we get out of bootie weather I'm gonna look into that.|| |