I finally got around to building a SL8. Mostly built to replace my Giant TCR as the main climbing bike. This was a super fun build project. 

All my parts were chosen with my fit needs and preferences in mind, not the absolute lightest parts available. I also needed some durability in the wheelset so unfortunately Extralites had to get ruled out. 

Some key bits/attention to detail to note: 

  • Handlebars- I chose a Darimo Flared handlebar for better ergonomics in the tops and downhill stability in the drops. 
  • Chainring- Went with a 46t to drop weight and since this is a climbing build I wanted something I could tackle insane gradients with whilst being 1x.
  • Brake hose bushings for less cable rattle as they enter the frame.
  • Titanium bolts have replaced all stock bolts to lighten it up but bring more silver to the bike. Yes, even the SRAM brake caliper bolts were swapped from black to silver. 
  • Did not install the seatpost rubber cover- personally I find it distracting 
  • Removed rubber bleed port gaskets from brake calipers as they don’t actually do much. 
  • Added two layers of bar tape where bars make contact with top tube to deaden impact if bars swing too far.
  • Used marine Silcone to “bond” front derailleur cover to frame. 
  • 3D printed an adapter for the Alpitude computer mount so it lays flat and in line with the handlebars top edge.
  • 10-28 cassette for normal days
  • 10-36 for crazy climbing days (15-30%) 

About the rider (me): 

5’5” (165cm) woman , long legs – 33.5 (85cm) inseam, 4.4 w/kg. Been riding competitively since 2015 and loving it! đŸ„°

About the bike: 

Specialized Tarmac S-Works SL8 ( 52cm) 

Weight: 13lbs ( 5.9kg)

Colorway: Gloss Glacial Metallic 

Groupset: SRAM red e1 12 speed. Crank arms 167.5

SRAM dub crank arm hole covers: Neat Components // 1.84 grams

Chainring : Gemini Rigel 46T // 98.9 grams

Wheelset: CRW ( Craft racing works 50/60 // 1,251 grams)

Tires: Continental gp5000 s tr 30mm

Brake rotors: Galfer wave road 160mm Front / 140mm Rear 

Front brake mount adapter: Ti Parts 3D printed titanium // 5.65 grams

Thru-axles: RideNow Titanium // 25.64 grams

Handlebar: Darimo Nexum Drag 400mm flared (reinforced // 273.29 grams)

Computer Mount: Alpitude with 3d printed spacer // 25.49 grams

Bar end plugs: CarbonWorks // 1.59 grams

Handlebar stem adapter: Dulight // 4.67 grams

Steerer expander and cap: Schmolke TLO carbon // 15.49 grams

Seatpost: Darimo 350 mm // 110.35 grams

Saddle: Specialized S-Works mimic 155 // 169.55 grams

Swat Garmin Varia adapter: 3D printed from Etsy // 15.81 grams

Carbon Fiber shifter clamps: // 12.16 grams

Bottle cages: Alpitude Superleggero // 19.7 grams

Rear Derailleur hanger: Silca 3D printed Titanium // 12.84 grams

Silca waxed chain

Silca Gen 2 sealant

Titanium bolts: BetterBolts

by RideWithStephanie

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8 Comments

  1. It’s even legal to have a S-Works Tarmac without Roval wheels? 😂

    Jk Amazing bike mate!

  2. MTFUandPedal on

    Wow…. None of that “look at my absolutely stock S-Works” rubbish.

    Bonus points for lots of attention to detail and the reasoning behind it.

  3. LunchboxStringCheese on

    So for “crazy climbing days 15-30%” you’re gonna be running a 46t and 10-36 cassette? That certainly doesn’t sound ideal to me regardless of how in shape you are

  4. No notes, sweet build! Tho I would not take that gearing out for any serious climbing, I like my knee cartridge

  5. NadhqReduktaz on

    As a 180 cm with 81 cm inseam male, I am struggling to comprehend 165 cm to 85 cm lol that has to be very high percentile I guess?
    And yeah, beautiful bike!

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