Trek Madone SLR 9 Gen 7 vs Trek Zelda 3i

Compare Specifications of Trek Madone SLR 9 Gen 7 and Trek Zelda 3i

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Trek Madone SLR 9 Gen 7
Trek Madone SLR 9 Gen 7

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Trek Zelda 3i
Trek Zelda 3i

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Technical Specifications
Load Carrying Capacity 125 kg (275 lb) Combined weight of bicycle, rider, and cargo of 300 pounds (136 kg)
Battery Shimano BT-DN300 --
Charger Charging cable included --
Frame 800 Series OCLV Carbon, KVF (Kammtail Virtual Foil) tube shape, IsoFlow seat tube, invisible cable routing, 3S aero chain keeper, T47 BB, flat mount disc, 142x12 mm thru axle Boomerang 6061-T6 aluminum with patented Flat Foot Technology
Stem -- Alloy classic
Handle Bar Size: 47
Madone Integrated handlebar/stem, OCLV Carbon, 80 mm reach, 124 mm drop, 35 cm control width, 38 cm drop width, 80 mm stem length
Size: 50, 52
Madone Integrated handlebar/stem, OCLV Carbon, 80 mm reach, 124 mm drop, 37 cm control width, 40 cm drop width, 90 mm stem length
Size: 54
Madone Integrated handlebar/stem, OCLV Carbon, 80 mm reach, 124 mm drop, 39 cm control width, 42 cm drop width, 90 mm stem length
Size: 56, 58
Madone Integrated handlebar/stem, OCLV Carbon, 80 mm reach,
Electra Cafe
Fork Madone KVF full carbon, tapered carbon steerer, internal brake routing, flat mount disc, carbon dropouts, 12x100mm thru axle Steel unicrown
Seatpost Size: 47, 50, 52, 54
Madone aero carbon seat post, 0 mm offset, short length
Size: 56, 58, 60, 62
Madone aero carbon seat post, 0 mm offset, long length
Classic alloy pillar
Grip Bontrager Supertack Perf tape Custom
Crankset Size: 47
Shimano Dura-Ace R9200, 52/36, 165 mm length
Size: 50, 52
Shimano Dura-Ace R9200, 52/36, 170 mm length
Size: 54, 56, 58
Shimano Dura-Ace R9200, 52/36, 172.5 mm length
Size: 60, 62
Shimano Dura-Ace R9200, 52/36, 175 mm length
Electra custom alloy 3-piece
Pedals -- Electra retro
Chain Shimano Dura-Ace/XTR M9100, 12-speed KMC S1 nickel plated
Shifters Shimano Dura-Ace R9270 Di2, 12 speed Shimano Nexus Revo 3-speed twist with optical gear display
Saddle Size: 47, 50, 52
Aeolus RSL, carbon rails, 155 mm width
Size: 54, 56, 58, 60, 62
Aeolus RSL, carbon rails, 145 mm width
Electra comfort with matching design with double-coil springs
Headset -- 1" steel threaded
Derailleur Front Shimano Dura-Ace R9250 Di2, braze-on, down swing --
Derailleur Rear Shimano Dura-Ace R9250 Di2, 34T max cog --
Hub Front -- Shimano Nexus 3-speed internal with coaster brake, 36h
Hub Rear -- Shimano Nexus HB-IM40 with roller brake hub, alloy, 36h
Cassette Shimano Dura-Ace R9200, 11-30, 12-speed 22t
Chainrings 1x: 50T, 2x: 54/40 44t steel chainring
Bottom Bracket Praxis, T47 threaded, internal bearing Sealed cartridge
Stand -- Integrated kickstand
Tyres
Front Bontrager R4 320, 700x25 mm RetroRunner 26" × 2.125"
Rear Bontrager R4 320, 700x25 mm RetroRunner 26" × 2.125"
Wheel / RIM F: Bontrager Aeolus RSL 51, OCLV Carbon, Tubeless Ready, 51 mm rim depth, 100x12 mm thru axle
R: Bontrager Aeolus RSL 51, OCLV Carbon, Tubeless Ready, 51 mm rim depth, Shimano 11/12 freehub, 142x12 mm thru axle
Painted alloy
Brakes
Front Shimano Dura-Ace hydraulic disc

Rotors
Shimano MT900, CentreLock, 160 mm (Size: 47, 50, 52, 54, 56, 58, 60, 62)
Shimano CL900, CentreLock, 160 mm (Size: 47, 50, 52, 54, 56, 58, 60, 62)
Shimano BR-C3000 roller brake
Rear Shimano Dura-Ace hydraulic disc

Rotors
Shimano MT900, CentreLock, 160 mm (Size: 47, 50, 52, 54, 56, 58, 60, 62)
Shimano CL900, CentreLock, 160 mm (Size: 47, 50, 52, 54, 56, 58, 60, 62)
Shimano coaster brake
Suspension
Front -- --
Rear -- --
Colors Available
Colors Deep Smoke
Azure
Satin Quicksilver
Axinite Flip/Trek Black
Viper Red
Metallic Red Smoke to Red Carbon Smoke
Pearl


Physical Specs
Length -- --
Weight 7.1 kg 17.04 kg
Overview
Features -- - Flat Foot Technology
Additional Details -- Painted fenders
Stainless steel and anti-rust hardware
Custom bell

Which one do you think is better? And why?
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