Tarmac S-Works Disc, how to make it lighter.
Moderator: robbosmans
Does anyone have one? I just ordered one in size 52. Was looking to take off a few pounds. Other than the stem, bars and seat.......does anyone know if the brake components can be lightened? Where to get light weight skewers for disc wheels? Please give me your thoughts and ideas...thanks
Last edited by mnmasotto on Mon Feb 09, 2015 4:26 pm, edited 1 time in total.
Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓ Broad Selection ✓ Worldwide Delivery ✓
www.starbike.com
I would imagine the wheels would be good candidates, not sure what their hubs weigh. But be careful; they have that funky rear offset. (Not sure if you can get a different derailleur hanger that would allow standard rear hub?)
If they are QR wheels, the hex bolt skewers are light without necessarily becoming flexy. Cheap steel ones will probably still save you measurable weight. But I really like the DT Swiss skewers; maybe in titanium if you want to shave weight (mine are steel).
If they are QR wheels, the hex bolt skewers are light without necessarily becoming flexy. Cheap steel ones will probably still save you measurable weight. But I really like the DT Swiss skewers; maybe in titanium if you want to shave weight (mine are steel).
Pottsy wrote:The bike will come with 2 hangers. One for running the Rovals (cassette is spaced to a 130mm hub) & another to run any other 135mm disc hub.
I just spoke to my Specialized Bicycle Dealer....They were not aware on these bikes coming with two rear derailor hangers...Where did you get this info???
Taking off a few pounds is gonna cost you dearly.
The best way would be to sell all parts and start a new build with the frame alone.
The best way would be to sell all parts and start a new build with the frame alone.
@ mnmasotto
What calipers come with the bike ?
R785's or RS785's ? If just the R's, then they have the banjo fitting, and the XTR's should bolt straight on, but if the RS, these have the straight fitting and will need a new set of lines to suit the caliper you are changing to.
What calipers come with the bike ?
R785's or RS785's ? If just the R's, then they have the banjo fitting, and the XTR's should bolt straight on, but if the RS, these have the straight fitting and will need a new set of lines to suit the caliper you are changing to.
Changing hydro calipers to me seems like a crazy way to try to save weight. It's going to be expensive, non trivial (you'll need to do a very thorough bleed), unknown savings (at present), and who's to say that the amount of fluid that the road levers push is identical to the XTR mtb levers? Maybe it is, but are you really that eager to find out?
Also, I know that the XTR brakes have changed since this post, but check out the savings between trail and racehere
I suspect that your R785 are similar in design to the XTR trail, and that by changing calipers most of the weight savings you'd see would be just from the elimination of the cooling fins on the pads. I suppose you could instead just get different (lighter) pads for your calipers, but reducing cooling capacity in a disc brake seems a bad way to save weight.
Also, I know that the XTR brakes have changed since this post, but check out the savings between trail and racehere
I suspect that your R785 are similar in design to the XTR trail, and that by changing calipers most of the weight savings you'd see would be just from the elimination of the cooling fins on the pads. I suppose you could instead just get different (lighter) pads for your calipers, but reducing cooling capacity in a disc brake seems a bad way to save weight.
So here are some things you can do.
swap to XTR calipers. lighter yes. (shimano says you will have less power than the current XT ones)
build some light weight wheels. (chainline will be affected)
get some narrow bars. (you may not like them)
If you bought it as a complete bike it will be a Di2 only frame. So no group set swap, at lease until SRAM wireless gets released.
swap to XTR calipers. lighter yes. (shimano says you will have less power than the current XT ones)
build some light weight wheels. (chainline will be affected)
get some narrow bars. (you may not like them)
If you bought it as a complete bike it will be a Di2 only frame. So no group set swap, at lease until SRAM wireless gets released.
First thing I did was exchange the stock skewers for Extralite Strreters. I love these skewers. They weight 28 grams and work very well. I did not weight the stock S-Works skewers as the batteries in my scale are dead. However, I am certain they weight at least 120 grams. I see there are a few large steel bolts on the bike. Namel, the stock brake caliper bolts, seat clamp bolts and the stock seat is not the S-Works variant. Any other ideas???
Pottsy wrote:So here are some things you can do.
swap to XTR calipers. lighter yes. (shimano says you will have less power than the current XT ones)
.....
There will be no difference in power, as the caliper piston sizes are the same (22mm dia - 2 off).
They even take the same pads, so no difference there
Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓ Broad Selection ✓ Worldwide Delivery ✓
www.starbike.com