Can't get enough setback - Are my femurs really as long as they seem to be?
10-20-17, 12:29 AM
#51
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For the record, ANY bike with a 74 degree seat tube angle has the seat pushed too far forwards and ANY rider will need a rearset seatpost to get a proper position. The OP is not a freak.
If you guys have pictures of someone who IS a FREAK and fits on a bike with a 74 degree seat tube angle, that ISN'T a TT bike, then I would like to see it.
74-75 degree seat tube angles should be for TT bikes ONLY.
If you guys have pictures of someone who IS a FREAK and fits on a bike with a 74 degree seat tube angle, that ISN'T a TT bike, then I would like to see it.
74-75 degree seat tube angles should be for TT bikes ONLY.
I ride a Tarmac with a 74˚ seat tube angle, a 20mm setback seatpost and 85mm saddle setback- not exactly freakish.
Also looked at dozens of pics of OP's bike online & didn't see anything out of the ordinary.
You might be OVERSTATING things a bit.
Last edited by woodcraft; 10-20-17 at 12:38 AM.
10-20-17, 02:00 AM
#52
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Really? Do you have pictures?
Your saddle must be REALLY high and its usual for really BIG frames to have more relaxed seat tube angles.
Are you riding a small frame with a REALLY long seatpost?
EDIT: OK, where are you measuring the saddle setback from? I'm talking about measuring it from the tip of the saddle. Where are you measuring from?
Last edited by AnthonyG; 10-20-17 at 04:29 AM.
10-20-17, 09:45 AM
#53
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85mm of saddle setback at 74 degrees!!!!!!
Really? Do you have pictures?
Your saddle must be REALLY high and its usual for really BIG frames to have more relaxed seat tube angles.
Are you riding a small frame with a REALLY long seatpost?
EDIT: OK, where are you measuring the saddle setback from? I'm talking about measuring it from the tip of the saddle. Where are you measuring from?
Really? Do you have pictures?
Your saddle must be REALLY high and its usual for really BIG frames to have more relaxed seat tube angles.
Are you riding a small frame with a REALLY long seatpost?
EDIT: OK, where are you measuring the saddle setback from? I'm talking about measuring it from the tip of the saddle. Where are you measuring from?
Here is the bike, 56cm, 73cm saddle height, saddle setback from BB to saddle tip.
Pretty NORMAL set up, IMO.
10-20-17, 03:53 PM
#54
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What I'm saying though is to get anything like that much saddle setback at say 2/3 the inseam length would require a more relaxed seat tube angle and at 1/2 the inseam length you would need a MUCH more relaxed seat tube angle.
That's just how the geometry works out. Your example doesn't really compare to the OPs example.
10-20-17, 07:32 PM
#55
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OK, I had a quick look for specifications. From what I can find that model has a 73.5 degree seat tube angle, its a large frame and you have a LOT of seatpost exposed, so yes, you could get that much saddle setback to the nose.
What I'm saying though is to get anything like that much saddle setback at say 2/3 the inseam length would require a more relaxed seat tube angle and at 1/2 the inseam length you would need a MUCH more relaxed seat tube angle.
That's just how the geometry works out. Your example doesn't really compare to the OPs example.
What I'm saying though is to get anything like that much saddle setback at say 2/3 the inseam length would require a more relaxed seat tube angle and at 1/2 the inseam length you would need a MUCH more relaxed seat tube angle.
That's just how the geometry works out. Your example doesn't really compare to the OPs example.
The OP claims 31" or 32" inseam. I have 32" inseam. I took the angle from specs for this years Tarmac.
My GF's 49cm Roubaix appears to have a 74˚ seat tube angle. She's about 5'1". Not sure of setback.
Are you seriously making an argument for the saddle setback of someone with 16" legs?
10-20-17, 08:03 PM
#56
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Are the Brooks rails really that short?
Drawing an imaginary line up the seatpost through the seat on the OP's bike, and looking at woodcraft's bike, both would hit more or less in the middle of the seat.
So, perhaps part of the issue is that the OP's saddle has a lack of adjustment.
Drawing an imaginary line up the seatpost through the seat on the OP's bike, and looking at woodcraft's bike, both would hit more or less in the middle of the seat.
So, perhaps part of the issue is that the OP's saddle has a lack of adjustment.
10-20-17, 08:42 PM
#57
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OK, hard numbers would be good. The OP has a 53cm frame with a short amount of seatpost exposed. Woodcraft has a 56cm frame with a LOT of seatpost exposed.
I know its a traditional frame vs a compact frame but still I find it hard to believe that the OP and Woodcraft have the same inseam.
My inseam is approx. 24" A child's inseam could be 16" although yes it is a little short.
It would be interesting to check your girlfriends saddle setback. I'm guessing 20mm or thereabouts at best. It may even be zero.
I know its a traditional frame vs a compact frame but still I find it hard to believe that the OP and Woodcraft have the same inseam.
My inseam is approx. 24" A child's inseam could be 16" although yes it is a little short.
It would be interesting to check your girlfriends saddle setback. I'm guessing 20mm or thereabouts at best. It may even be zero.
10-21-17, 11:34 AM
#58
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OK, hard numbers would be good. The OP has a 53cm frame with a short amount of seatpost exposed. Woodcraft has a 56cm frame with a LOT of seatpost exposed.
I know its a traditional frame vs a compact frame but still I find it hard to believe that the OP and Woodcraft have the same inseam.
My inseam is approx. 24" A child's inseam could be 16" although yes it is a little short.
It would be interesting to check your girlfriends saddle setback. I'm guessing 20mm or thereabouts at best. It may even be zero.
I know its a traditional frame vs a compact frame but still I find it hard to believe that the OP and Woodcraft have the same inseam.
My inseam is approx. 24" A child's inseam could be 16" although yes it is a little short.
It would be interesting to check your girlfriends saddle setback. I'm guessing 20mm or thereabouts at best. It may even be zero.
OK, well played.
I think I found a pic of you on your bike.
Last edited by woodcraft; 10-21-17 at 11:47 AM.
10-21-17, 12:20 PM
#59
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I guess the big question to the OP....
Was moving the seat back just to stay in KOP's? Or was he experiencing discomfort or pain when the seat was in a more normal position.
I'm not a big KOP's supporter. It's just a reference that works for some.
As for the discussion of seat tube angles, there is only about one cm of movement per degree of change from 74 to less on a seat that sets 60 cm from the crank center.
Was moving the seat back just to stay in KOP's? Or was he experiencing discomfort or pain when the seat was in a more normal position.
I'm not a big KOP's supporter. It's just a reference that works for some.
As for the discussion of seat tube angles, there is only about one cm of movement per degree of change from 74 to less on a seat that sets 60 cm from the crank center.
10-21-17, 04:22 PM
#60
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Don't laugh. I DO ride bikes that size (24" wheels). A bit more seatpost exposed than that but basically that size. I own a completely custom Road bike built around 650c wheels and a 70 degree seat tube angle.
10-23-17, 11:57 AM
#61
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First hand made, but Tom Richey had to go overseas to get the numbers up too..
I found on gravel roads they climbed poorly, But now I have Bodged together one, from a Frame
found with a broken dropout and for street use its fine..
seat tube is a 68 I think.. maybe 70.
....
10-23-17, 12:17 PM
#62
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Campagnolo made a variation of their seat post to suit that narrower rail track
more common and typical is 36mm wide, 60 long..
Ref <C>catalog 16
...
