The surface of the new brake discs and brake pads must be smooth so that there is sufficient friction for braking. It is possible that if you use the new brake pads together with brake discs that are a bit too old, the friction surface will be small, then it will not work so well, usually it gets better after you have cycled 50km to 80km.
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Bike Disc Brake Rotors 6 Inch Bicycle Radiator Mountain Bike Cooling Fins Disc Brake Pads with Bolts for MTB Road Bicycle
Aliexpress UK
BUCKLOS BRP-01 disc brake pads have resin, semi-metal, multi-metal, sintered metal, copper-based, ceramic,compatible with Shimano MT200/M355/M446/M315/M365/MT400/MT500/M375/M395/M415/M416/M445/M447/M465/M475/M485/M486/M495/M525.Also compatible with Tektro HD-M740/M730/M520/M521/M510/M500/M501,etcFit for most of bicycles. BUCKLOS BRP-01 Disc Brake Pad： Brand：BUCKLOS Model:BRP-01 Color:Black/Green Weight:1pair/24.8g Material：resin, semi-metal, ceramic Bike Type:Mountain Bike, Road Bike, Ebike Product Size:35*31*4mm Package includes ：1/2/4/8pairs.
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DOMEN Bike Spacer Disc Spacer Bicycle Hydraulic Disc Brake Pads Spacer For MTB Bicycle Brake System Bicycle Repair Tools
Aliexpress UK
Clarks M2 ( models after 2018 ), M2 Junior, M1, S2, Clout 1, Clout Junior, Clout Plus, E-Clout, CMD-22, React 2, Sync-2E, CMD-22FM (Flat Mount), CMD-23, CMD-25, CMD-27, CMD-28, CHM-08, CBS-02, HD-M3000, HD-M3000 Plus, HDB-M-210.
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DOMEN Bicycle Spacer Disc Spacer Bike Hydraulic Disc Brake Pads Spacer For MTB Bicycle Brake System Bike Repair Tools Tool Parts
Aliexpress UK
F1, DSK-927, Q6, DSK-909, DSK-916, Lucid, Solve, Solve S, Solve ST, Decode R. Disc Brake Pads. We cooperate with leading factories around the world to bring you proven high performance products. Our aim is to provide high-quality products with superior performance to cyclists all over the world.
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Bicycle Spacer Disc Spacer Bicycle Hydraulic Disc Brake Pads Spacer For MTB Bicycle Brake System Bicycle Repair Tools
Aliexpress UK
One pair of high quality v brake blocks. 2 brake blocks supplied. Suitable for all cycles with v brakes.
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BUCKLOS Bike Brake Spacer Bicycle Disc Rotor Adjustment Mountain Bike Disc Brake Disc Pad Adjusting Spacer Bike Repair Tool
Aliexpress UK
Suitable for Shimano M515, M395, M445, M525, M575, M475, M485, M486, M495. 2/4 Pairs of disc brake pads. Safe and comfortable, value for money, ideal for bike tours. Excellent for any braking system, maximum performance and stability in dry or wet conditions.
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NUTT E-Bike Scooter Electric Brake Lever Bike Bicycles 22.2MM With Bell For Bicycles V-Brake / C-Brake / Line-Brake / Drum-Brake
Aliexpress UK
MT500,MT200. M416A,M415,M4050,M3050,M395,M375,M365,M355,M315,T675,T615,TX805. Shimano C501,M575,M525,M495,M486,M485,M475,M465,M447,M446,M445,M416. -Low disk wear and comfortable braking feel,Stable,Durable and excellent power modulation.
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Bicycle Disc Brake Pad Adjustment Alignment Tool Plate Brake Rotor Adjustment Bicycle Brake Adjustment Pad Cycling Repair Tool
Aliexpress UK
D / H / N-Type Deore BR-M6120 Trail, All-Mountain. D / H / N-Type ZEE BR-M640 Freeride, Gravity, Enduro. Compatible with all Shimano 4-piston calipers using D-Type, H-Type, or N-Type pads — engineered for riders seeking precise lever feel, fade-free braking, and consistent modulation in aggressive trail and enduro conditions.
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1PC Bicycle Disc Brake Pad Adjustment Alignment Tool Plate Brake Rotor Replace Cycling Brake Adjustment Pads Bike Parts Repair
Aliexpress UK