Who has a late model Felt DA?

Triathlon Forum
1

i’ve got a spreadsheet going, i’m hoping to debug it. if you have a recent model (current mold) Felt DA, and you’ve got Felt’s bars on it (really i guess it would have to be a 2013 model, because i don’t know what else would come with these current bars) i want you to measure pad x/y (make sure the bike is level, do this RIGHT), and then tell me what you’ve got on there (whether the pads are mounted to the bracket in the forward, center or rearward hole, what the stem length/pitch is, esp if it’s a 1pc stem, and whether the extensions are hard up against the clamps or are pulled back any).

this is what the spreadsheet does: you give me your pad x/y, i tell you what size DA, what stem, mms of pedestals under the pads, where the pads should be located, etc. i’m building this spreadsheet for all the superbikes, the IA is next i hope, but i’d like to debug the DA spreadsheet first.

2

i’ve got a spreadsheet going, i’m hoping to debug it. if you have a recent model (current mold) Felt DA, and you’ve got Felt’s bars on it (really i guess it would have to be a 2013 model, because i don’t know what else would come with these current bars) i want you to measure pad x/y (make sure the bike is level, do this RIGHT), and then tell me what you’ve got on there (whether the pads are mounted to the bracket in the forward, center or rearward hole, what the stem length/pitch is, esp if it’s a 1pc stem, and whether the extensions are hard up against the clamps or are pulled back any).

this is what the spreadsheet does: you give me your pad x/y, i tell you what size DA, what stem, mms of pedestals under the pads, where the pads should be located, etc. i’m building this spreadsheet for all the superbikes, the IA is next i hope, but i’d like to debug the DA spreadsheet first.

Dan,

How do you rectify rotation adjustment with Pad “Y”?
Pad “X” position is nearly infinite with the ~200mm of clamping area you have on the extensions.

I’m trying to figure out how this spread determines HOW the pads are mounted.

-Dave

3

“How do you rectify rotation adjustment with Pad “Y”?”

pad clamp rotation around the extension? i don’t consider that something i have to account for. if that’s desired, then, the rider or fitter would do that instead of something else called out in the equation, that is, instead of 5mm of pedestal he can normalize for that with his outward rotation of the pads, if that is worth 5mm. there’s obviously a finite amount of “lowness” you can get using that pad rotation technique, and that would be in place of pedestals.

“Pad “X” position is nearly infinite with the ~200mm of clamping area you have on the extensions.”

not if the pursuit position is of any import. can you imagine a bike that “fits” with the extensions pulled back 40mm and the pads sitting on the back of that extension? the pursuit bars on that bike are already somewhat forward swept, so, i don’t think realistically there is that much fore/aft movement of the pursuits. i don’t count AT ALL the possibility of putting the pad in front of the pedestal structure, and i limit the rearward placement of the pad to: 1) mounting on the pad’s front hole (of 3 available hole sets); 2) pad clamp sitting 10mm behind the pedestal structure.

this would mean that you have something like 40mm of “x” movement just in pad placement, as the front and rear holes are 30mm apart from each other, plus that rearward 10mm. that’s quite a lot when you consider, in the 30mm height, 70/30 and 100/30 stems.

so, for example, pad x/y of 490/645 would yield 56cm frame, 100/60 stem, no pedestals, pads mounted in their forward holes, which pushes the pads all the way back. an “x” of 495 would mean you move the pads to the center hole and push the clamp back 10mm. “x” of 500 means you place the clamp 5mm back. “x” of 505 has the clamp all the way up against the pedestal structure. in each case there are no pedestals under the pads. when you want to go even further forward - yet more “x” - you eventually then move the pads to the far forward hole, which is 15mm forward per hole, and then you move the pads back 10mm to give you that incremental 5mm forward movement.

if you want to move yet further forward - that same “y” of 645 but an “x” of 525mm, you really can’t do that very well with the 56cm bike. it’s too much weight over the front of the bike. so you move to the 58cm bike, the 100/30 stem, 10mm of pedestal, but you’ve got to move the pads back a bit because the 58cm bike is 15mm longer than the 56cm bike, plus the 100/30 stem has 10mm more “reach” than the 100/60.

i sent you the spreadsheet via email, you can look it over, see what you think. i’m certain there are mistakes there, i have to clean it up a bit, but i just can’t find any better way to translate fit coordinates to complete bike solutions on the DA than this.

4

“How do you rectify rotation adjustment with Pad “Y”?”

pad clamp rotation around the extension? i don’t consider that something i have to account for. if that’s desired, then, the rider or fitter would do that instead of something else called out in the equation, that is, instead of 5mm of pedestal he can normalize for that with his outward rotation of the pads, if that is worth 5mm. there’s obviously a finite amount of “lowness” you can get using that pad rotation technique, and that would be in place of pedestals.

“Pad “X” position is nearly infinite with the ~200mm of clamping area you have on the extensions.”

not if the pursuit position is of any import. can you imagine a bike that “fits” with the extensions pulled back 40mm and the pads sitting on the back of that extension? the pursuit bars on that bike are already somewhat forward swept, so, i don’t think realistically there is that much fore/aft movement of the pursuits. i don’t count AT ALL the possibility of putting the pad in front of the pedestal structure, and i limit the rearward placement of the pad to: 1) mounting on the pad’s front hole (of 3 available hole sets); 2) pad clamp sitting 10mm behind the pedestal structure.

this would mean that you have something like 40mm of “x” movement just in pad placement, as the front and rear holes are 30mm apart from each other, plus that rearward 10mm. that’s quite a lot when you consider, in the 30mm height, 70/30 and 100/30 stems.

so, for example, pad x/y of 490/645 would yield 56cm frame, 100/60 stem, no pedestals, pads mounted in their forward holes, which pushes the pads all the way back. an “x” of 495 would mean you move the pads to the center hole and push the clamp back 10mm. “x” of 500 means you place the clamp 5mm back. “x” of 505 has the clamp all the way up against the pedestal structure. in each case there are no pedestals under the pads. when you want to go even further forward - yet more “x” - you eventually then move the pads to the far forward hole, which is 15mm forward per hole, and then you move the pads back 10mm to give you that incremental 5mm forward movement.

if you want to move yet further forward - that same “y” of 645 but an “x” of 525mm, you really can’t do that very well with the 56cm bike. it’s too much weight over the front of the bike. so you move to the 58cm bike, the 100/30 stem, 10mm of pedestal, but you’ve got to move the pads back a bit because the 58cm bike is 15mm longer than the 56cm bike, plus the 100/30 stem has 10mm more “reach” than the 100/60.

i sent you the spreadsheet via email, you can look it over, see what you think. i’m certain there are mistakes there, i have to clean it up a bit, but i just can’t find any better way to translate fit coordinates to complete bike solutions on the DA than this.

Well the base bar is designed to be “long” in that the bar bore to brake lever mounting area is ~2cm longer than the “average” base bar at the brake lever. Trimming the base bar 2cm at the brake levers effectively shortens the cockpit in that position. Don’t forget also that the base bar is “flippable” so that a higher brake lever position can be achieved if a “hoods” position is desired over a “drops” handhold.

I’ll look over your work and thank you for helping get something in the hands of consumers that serves our brand.

-Dave