Thursday, May 12, 2016

Saddle Fit

A write up about saddle fit from a colleague Kai Kaltenbach.
 
1.       Size your sit bones with memory foam, or aluminum foil on carpet
2.       Determine saddle width by seating position:

Different manufacturers use slightly varying fit methods, for example Selle Italia uses S & L for widths and 1-2-3 for position in order of more aggressive, e.g. their 145mm aggressive fit is L3. Bontrager is the same, using the terminology “Posture 1-2-3”.

 
3.      Identify your saddle profile. This is the toughest part because it can only be based on experience. There are 2 lengthwise profiles and 3 sideways profiles.

a.      Lengthwise profiles are Flat or Waved. Flat is best for riders who shift position quite a bit, while waved is better for those who change less often and/or sprint (since the wave helps keep you from sliding off the back of the saddle). Avoid a combination of slippery bib shorts and flat profile saddle with a smooth finish, because you’ll slip around too much.

b.      Sideways profiles are Round, Semi Round, or Flat. There is no rule of thumb for choosing a profile, it’s about preference and anatomy. However, in general, Round is a bit of a legacy profile mostly used by cyclists who started in the ‘80s or ‘90s with classic saddles like the Regal. When in doubt choose Semi Round.

4.      Buy a saddle with very little padding. Ironically this may raise the price a bit -- it’s hard to find a low-end saddle with minimal padding because less experienced cyclists also spend less and want more padding. The pads should be in your bib shorts, not on the saddle (cue separate bib shorts thread J). Particularly avoid saddles with the word “gel” associated.

5.      Recommend a cutout (perineal relief), but avoid other gimmicks. You will talk to lots of folks who have some weird-ass saddle that has been good for them, but it’s unlikely to be good for you. Particularly avoid anything with the nose cut off. Those saddles exist because of a wrinkle in UCI regulations about distance between the tip of the saddle and the handlebars. I mean no slight to folks who have found success with these saddles, but they are too fringe to go around recommending to random people. If it looks like it should be on a TT bike, it probably should stay on a TT bike.

6.      Saddle mounting position, start with the UCI mandated flat fit (using a spirit level lengthwise) then test ride and adjust to preference. If your hands get numb, it’s an indication that the saddle is angled too far down in the front. If the saddle nose feels uncomfortable when you have your hands in the drops, then it’s probably angled too far up in the front.

 
 

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