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Clydesdales/Athenas (200+ lb / 91+ kg) Looking to lose that spare tire? Ideal weight 200+? Frustrated being a large cyclist in a sport geared for the ultra-light? Learn about the bikes and parts that can take the abuse of a heavier cyclist, how to keep your body going while losing the weight, and get support from others who've been successful.

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Old 04-21-10, 04:34 PM   #1
bleedingapple
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Ti or CF seatpost?

So I'v got an AL bike now and would like to soften the ride a little bit. It has a 27.2 ST diameter. I weigh 240-250. I could care less about bike weight... Anyway I'm wondering what will work best and that I wont break. I have been reading a lot about carbon posts being bad for large riders. I've been wondering how true this is. Also am I going to feel a big difference in the ride by having the CF post or the Ti post?

A point to make is that if I do get either of these, they will not be from the high end manufacturers. Like as far as the CF goes it would be one of the cheaper options from Nashbar and something simular as far as the Ti goes too...

Thank you.
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Old 04-21-10, 04:49 PM   #2
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Thomson Al, soften ride with wheel/tires.
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Old 04-21-10, 04:50 PM   #3
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Bumping up my tire size from 21mm to 23 mm seems to have made a bigger difference for me in taking off some of the road buzz than when I borrowed my friends carbon seatpost. I didn't notice any difference with the carbon seatpost. I'm probably going to bump up to 25mm for my next set of tires if they will fit in my stays.
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Old 04-21-10, 05:25 PM   #4
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Regardless of the material it's made of the seat post isn't going to make a huge difference in ride quality. Unless you have a sloping geometry frame with a lot of seat post.

Regarding CF seat posts, if you don't get a high quality one don't bother. If you want a softer ride wider tires is your easiest/cheapest fix.
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Old 04-21-10, 05:31 PM   #5
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tires first, though being a heavier rider myself its hard to do much with tires because you need the pressure to keep from rimming out. You can always get a suspension post. I personally would never use a carbon post for fear of how badly a catastrophic failure would injure me.
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Old 04-21-10, 05:33 PM   #6
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if you do go suspension post get something like a Thudbuster not just a crappy internal spring post.
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Old 04-21-10, 06:24 PM   #7
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I honestly can't tell much difference between my Thomson aluminum seatpost and my FSA carbon seatpost...
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Old 04-21-10, 06:43 PM   #8
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I was going to recommend wider tires but everyone else beat me to it.

To the comment that wider tires still need to be kept at a higher pressure is true to a certain extent... but at 250 lbs you can run 700 X 28 C tires at ~90psi, but you would need to run 23c tires at ~115 or so.

If the bike has room for even wider tires then even lower pressures are possible. My main ride right now has 700 X 32 tires.
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Old 04-21-10, 06:48 PM   #9
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I've got the Ascent CF seat post from Nashbar on my road bike (my bike came with a Fuji CF post but I needed a few mm more length than it had so I put it on my wife's Fuji and bought the Nashbar one). I believe any improvement is psychological but it looks pretty cool and has held up well under my clyde weight.
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Old 04-21-10, 08:56 PM   #10
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My second hand bike came with a carbon post. This is an older steel frame with 23 tires. It ends up being more comfy than my Surly Cross Check with 32 tires and a Brooks Flyer. Go figure.
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Old 04-21-10, 11:52 PM   #11
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Quote:
Originally Posted by redvespablur View Post
My second hand bike came with a carbon post. This is an older steel frame with 23 tires. It ends up being more comfy than my Surly Cross Check with 32 tires and a Brooks Flyer. Go figure.
That's because you are comparing an apple and an orange. Two different frames from two different designers with two different results. You can have two different frames made with the same materials and completely different rides. Frame design can have a huge effect on ride quality. Not so with a seat post.
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Old 04-22-10, 05:28 AM   #12
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Quote:
Originally Posted by sooprvylyn View Post
if you do go suspension post get something like a Thudbuster not just a crappy internal spring post.
+1 on the Thudbuster

I have the LT (long Travel) Thudbuster on a Dahon folder and the ST (short Travel) on a Surly LHT. They both are great products, very good construction, and work wonders on smooth out the ride.

Brian
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Old 04-22-10, 02:05 PM   #13
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You're not going to flex a seat post enough to absorb any shock (it's mostly loaded in compression).

A saddle with more flexible mounting can soak up vibration (I love my Selle Italia Turbomatic 3 which has the rails surrounded by elastomer where they meet the saddle). You might find a used or NOS example on E-bay)

Bigger tires can run at lower pressures without pinch flats (While 23mm tires were fine when I weighed 145 pounds, at 205 the 25mm are definitely nicer. 28mm tires fit my road bike (Litespeed Natchez, Campagnolo dual pivot brakes) too although I haven't tried any apart from the cross tires I used for winter commuting on bad days.
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