Weight Weenies

Bicycle Part: Shimano CS-R8000 11s Ultegra 14-28 cassette
Size/Length: 14-28
Included Parts: plastic spacer
Weight: 291.2g
Notes: used <1000km; claimed weight is 300g

Bicycle Part: SRAM PG-1170 11s 11-26 cassette
Size/Length: 11-26
Included Parts: alloy spacer
Weight: 244.8g

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SRAM Red etap 11 speed left brake lever SRAM Red etap 11 speed right brake lever SRAM Red front and rear rim brakes regular mount SRAM Red etap front derailleur SRAM Red etap rear derailleur wifli cage SRAM Red 1190 11-28 cassette

SRAM Red 22 rear derailleur with bbb ceramic pulley wheels. 144.6 grams SRAM Red 22 front derailleur. 75 grams

Shimano Ultegra 6800 11-28, 251 grams

SRAM Force rim brake regular mount, 291 grams

- a pair -
Bicycle Part: Shimano BR-R9200 Dura-Ace rim brake calipers
Size/Length: null
Included Parts: R55C4
Weight: 327.0g
Notes:

(Sorry, have to take a break from all that heavy lifting.)

Bicycle Part: PRO handlebar Vibe Carbon Aero Superlight
Size/Length: 40cm
Weight: 213.5g
Excludes Parts: 3.5g routing help liner
Notes: claimed weight is "from 195g"; width is C-D: outer-outer at where you'd mount the STI is 425mm

For size 38cm please see: viewtopic.php?f=3&t=170951&start=60#p1797406

You can get lighter aero handlebars for the price, though with a slightly different shape. For example, the Pro PLT compact (about 215g for 100€ less).

- a single -
Bicycle Part: Carbon-TI bottlecage holder bolt
Size/Length: aluminium M5×10
Weight: 0.74g
Excludes Parts: dry (w/o any threadlocker)
Notes: weight difference due to anodization below sensitivity of my scales

Bicycle Part: Carbon chain catcher
Weight (according to manufacturer): 4 grams
Weight (real): 2,68 grams

Scale Shot:

Bicycle Part: Shimano RD-R8000 Ultegra rear derailleur
Size/Length: SS
Excludes Parts: OT-RS900
Weight: 197.0g
Notes: new with the factory-applied blob of grease

Bicycle Part: Shimano RD-R8000 Ultegra rear derailleur
Size/Length: GS
Excludes Parts: OT-RS900
Weight: 205.8g
Notes: new with the factory-applied blob of grease

Bicycle Part: Shimano FD-R9100 Dura-Ace front derailleur
Includes Parts: support plate (Y2BA98020)
Excludes Parts: sticker
Weight: 71.28g
Notes:

- four to a set -
Bicycle Part: Spécialités TA chainring bolts for Shimano R5800 to R9200
Weight: 4.7g
Notes: the four original Shimano bolts from R7000 weight 11.96g

Bicycle Part: Token TK221 Shark Tail TI QR skewer
Weight: 46.33g
Notes: claimed weight is 51g

There's lighter QR skewer, like J&L's titanium (about 30g), but my impression of these made by Token is you can close them with confidence.

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