I was soft pedaling while coasting the other day, meaning the freehub body was clicking, aka not engaged. I could get the SRM to read 2-5 watts. I know my bearings are pretty crunchy, not as bad as 2010 (when I could get the SRM to read 15 watts on no load - the bearings were literally indexed every so many degrees). My comment on Contador's bearing thing has got me thinking that saving 2-5 watts would be significant for me, at least in terms of background wasted energy. One of these days.
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Originally Posted by hack
(Post 16918182)
On a whim, I picked up a new old stock Scott Foil (and because it was super cheap), but it's got a 25mm offset seatpost and I'm needing the zero offset version. Anyone know if these are available for sale anywhere?
41? tetonrider, just curious what bike is this going to be on? |
Originally Posted by Racer Ex
(Post 16918314)
Yes. Scott will sell you one at a stupid price, but if you Google around I've seen several people that would swap your 25 for their zero (I would have when I got my Foil).
Originally Posted by ips0803
(Post 16918555)
There's a thread on weightweenies for people to swap.
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Originally Posted by ips0803
(Post 16918555)
tetonrider, just curious what bike is this going to be on?
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thanks for the suggestions.
Originally Posted by Racer Ex
(Post 16918314)
If you really want to go light on this ditch the Di and go to a single friction shifter mounted on the bar and a SRAM red rear mech (it'll take a 14t lower jockey).
going the red route (rd, friction shifter, separate brake lever, cable/housing) would be about 300g. that's a meaningful difference. might leave this one on the table for next year as it involves buying more parts and a bit more building. (not much, but at this point i'm low on time.)
Originally Posted by Racer Ex
(Post 16918314)
10speed Token aluminum cassette.
Originally Posted by Racer Ex
(Post 16918314)
Tufo S3 Lite tires (145g).
regardless, i've got some light vittoria tubulars (190g) on a light wheel set. glued up, tested low Crr... race proven for me already.
Originally Posted by Racer Ex
(Post 16918314)
Ti skewers with screw on fasteners.
Originally Posted by Racer Ex
(Post 16918314)
Carbon saddle as noted.
could go with a saddle+post combination...they make some crazy light ones. probably looking at 50-100g, which at this stage where gains are tiny is actually huge.
Originally Posted by Racer Ex
(Post 16918314)
No rear brake. KCNC front with a cyclocross type lever.
i'll be running a di2 tt brake/shift lever. it's essentially the weight of a regular TT brake lever, so that's one area where di2 pays off a bit.
Originally Posted by Racer Ex
(Post 16918314)
Powercordz cable. You can get a flat carbon MTB bar in the 105g range. There's around 2+ pounds right there.
flat bar is definitely a savings of about 100g. i went the bullhorn route because i have one and i have the TT brake/shift levers. great thought.
Originally Posted by Racer Ex
(Post 16918314)
If this is the Venge there's >200g of paint on it...
at this point, i've got to pretty much shut things down. the HC is in about 2.5 weeks, i'm traveling for about 10 days in between, and i need to install and test the setup (wide/narrow single ring+no FD+no guides/guards; bullhorn+tt shifter setup, etc.). i think i've trimmed about 3# off of my bike (which is ridiculous...it wasn't exactly heavy last year) vs how i ran it last year. the ideas above could trim another 300g (red, flat bar, powercordz, saddle+post), which is insane. might leave those to ponder for next year, in case i'm close but fall short on my goal this year. thank you! |
Originally Posted by carpediemracing
(Post 16918402)
I was soft pedaling while coasting the other day, meaning the freehub body was clicking, aka not engaged. I could get the SRM to read 2-5 watts. I know my bearings are pretty crunchy, not as bad as 2010 (when I could get the SRM to read 15 watts on no load - the bearings were literally indexed every so many degrees). My comment on Contador's bearing thing has got me thinking that saving 2-5 watts would be significant for me, at least in terms of background wasted energy. One of these days.
bearings aren't hard to replace. incidentally, one reason why some pro teams use full ceramic bearings is not that they save energy (bikes are really the wrong application), but rather they can power wash the stuff without risk of corrosion. yeah, they have to use proper grease, but rust isn't a factor. a good steel bearing is pretty awesome. losses like what you describe don't scale with power, so with your self-described lower average power, you would stand to see more gain. if i were closer i'd personally replace them for you. |
Originally Posted by carpediemracing
(Post 16905639)
Aluminum cogs? The big ones especially.
Have you optimized your pedals? Ti axle, esp for the short event. I think the Look hardware is steel, just soft. There are ti bolts out there for Looks. Alum spacers if they're not already, I don't know what they are. If it were me I'd make my Aerolites work. About 70g per pair with cleats and hardware (they say 38g per side, that's about right), but it's the devil to set up, you have to drill into your shoes. In fact I still want to make my Aerolites work but it's such a pain. probably not going to do the aerolites at this point but may consider in the future...esp if this year is "close-but-not-quite." |
Originally Posted by carpediemracing
(Post 16918396)
There's a guy that used to do the Gimbels ride with no post/saddle. I think he was featured in some local paper article. I tried to stay away from him.
wound up losing a spot due to the crash but finished pretty respectably. i was 3rd or 4th over the top (the riders ahead of me were way out of my league)--and i didn't want to give up that performance. in hindsight, it was pretty risky. the terrain wasn't insane at that point but the rest of the descent was fast & loose. my quads have never been so sore! |
Originally Posted by tetonrider
(Post 16914540)
for a laugh, i've thought about doing this climb with a backpack & jugs of water totaling what i used to weigh in 2009. quick calcs put me at 8-9' slower, but it is a substantial amount of weight so i think the back-of-the-envelope thing falls down a bit...would probably be far, far slower.
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Originally Posted by rankin116
(Post 16923928)
I'm sure I've missed it, but how much have you lost since 2009?
as of this morning, i'm 1.5# away from the target weight i set 8 months ago. will probably go for a DXA in a few weeks, just out of curiosity. i've been a little heavier and ~9% BF. i think i'm lighter and leaner now. i'd guess 7-8%. |
make sure to use super short valve extenders
I see we're still ignoring the colonic suggestion. you could be 3lbs under your goal weight! |
Originally Posted by tetonrider
(Post 16923816)
cdd, man....with as measured as you are in so many areas....maintain that bike! :)
bearings aren't hard to replace. incidentally, one reason why some pro teams use full ceramic bearings is not that they save energy (bikes are really the wrong application), but rather they can power wash the stuff without risk of corrosion. yeah, they have to use proper grease, but rust isn't a factor. a good steel bearing is pretty awesome. losses like what you describe don't scale with power, so with your self-described lower average power, you would stand to see more gain. if i were closer i'd personally replace them for you. |
Originally Posted by carpediemracing
(Post 16924615)
Arg. I'm buying new bearings now.
the zipp steel bearings are actually really, really nice, though not dirt cheap. i'd take more frequent new bearing over expensive bearings any day. ironically, those who race/ride in inclement weather are probably better candidates for full ceramics. hope they treat you right, cdr. |
Originally Posted by tetonrider
(Post 16927109)
money well spent.
hope they treat you right, cdr. |
Originally Posted by carpediemracing
(Post 16927255)
BB30 bearings. My cranks don't turn really easily. Before I bought the BB30 facing tools I could see as high as 15 watts, but that was at unrealistically high rpms, like 150 rpm. At normal rpms it was something like 6-8w. This was early 2010, my "good" year.
bb30...even easier. good luck! crunchy = not good. |
you know, you could save a lot of trouble by getting a Trek Emonda. 10 lbs with wheels that are as light as the ones you'll be using, and you can shed additional weight by removing a few more parts.
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or a colonic. http://d8k4pmvhwsscm.cloudfront.net/...-header(1).png
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Fudgy is obsessed with all things rectal. NTTAWWT
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I've read on here about bottom bracket issues - I don't really understand it. Do they wear over time from all of the torque applied to the pedals and, subsequently, the frame? Is there anything to look out for?
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Originally Posted by Gramercy
(Post 16940137)
I've read on here about bottom bracket issues - I don't really understand it. Do they wear over time from all of the torque applied to the pedals and, subsequently, the frame? Is there anything to look out for?
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Originally Posted by Gramercy
(Post 16940137)
I've read on here about bottom bracket issues - I don't really understand it. Do they wear over time from all of the torque applied to the pedals and, subsequently, the frame? Is there anything to look out for?
Speaking of headsets mine has been making a cracking sound since Exeter. Another bill from that race. |
Originally Posted by shovelhd
(Post 16940076)
Fudgy is obsessed with all things rectal. NTTAWWT
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Originally Posted by Ygduf
(Post 16940054)
or a colonic.
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Originally Posted by Gramercy
(Post 16940137)
I've read on here about bottom bracket issues - I don't really understand it. Do they wear over time from all of the torque applied to the pedals and, subsequently, the frame? Is there anything to look out for?
Facing has made it better but my hack file job basically screwed up my BB shell. Now the bearings creak and such. Any press fit BB bearing moves - the first Gary Fisher BBs were a nightmare. When Merlin used the press bearing BB we replaced bearings all the time. A Trek dealer told me that all the BB86s (press fit Shimano) get loose and it's basically a normal maintenance thing to replace the bearings. They go more frequently than rear tires, which should be about the quickest wearing thing on a bike. This time I hope to do a better job, build up the gaps with something, etc. Maybe it'll last until the end of the summer. |
Do you use loctite when pressing the bearings? It will potentially solve your issues as long as you have a good enough press to keep everything square.
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