New disc brakes are meant to feel weak. It is not the adjustment, and it is not your hands.

Weak new brakes are normal, and adjusting them will not help

The single most useful thing to know, because it stops a chain of wrong fixes. Guidance states it directly: there is nothing wrong with the brakes or with your hands, and the lack of power with new pads, new rotors or both is completely normal. The brake is missing its friction layer and its mated surfaces, neither of which is an adjustment. So before touching the caliper, ordering a bleed kit or going back to the shop, do the procedure. And note when it applies: because bedding also sculpts the pad and rotor to mirror each other, it is required any time either part is replaced, so new pads on an existing rotor need it just as much as a complete new set.

The procedure is discrete stops, one wheel at a time, and heat is the reason

The method most sources converge on: get up to roughly ten miles an hour, apply one brake as firmly as you can without locking the wheel, release just before you come to a complete stop, build speed back up and repeat fifteen to thirty times, then do the other brake. The one-wheel-at-a-time part is not fussiness, and the reason given is specific: doing one at a time maximizes friction and heat, because one brake doing the work of two builds heat. Bedding is a thermal process, so anything that spreads the heat across both brakes slows it down.

Listen for the squeal turning into a soft grinding sound

The best feedback signal in this whole procedure, and it means you are not working blind. One source describes it precisely: the pads may squeal during this phase, but as the pads and rotor get to know each other that will change after half a dozen or so slowdowns and you should start hearing a soft grinding sound. So early squeal is expected rather than alarming, and the transition to a duller grinding note is the audible confirmation that material is transferring. If the squeal is still a clean high squeal after a dozen stops with no change in character, that is the point to suspect contamination rather than to keep going.

Four named mistakes, and one of them feels like extra effort

The failure list is short and specific: coming to a full stop during bed-in, braking too hard early, allowing no cooldown between stops, and doing bed-in on a long downhill. Full stops and early hard braking both risk glazing the pads by putting too much heat in too quickly, which is the opposite of what you want and produces the same weak, noisy result you were trying to fix. The downhill one is worth flagging because it feels like the efficient approach and it is really just dragging, which puts heat in continuously with no cooldown. And there is a matching warning about being too casual: bed in deliberately rather than just going for a ride, to avoid transferring too much material and clogging the pores of the rotor.

The rotor can be cleaned. The pads usually cannot

This asymmetry decides whether a contamination problem costs you ten minutes or a set of pads. Pads are described as porous like a sponge, absorbing any oil, grease or spray that touches them, and one drop of chain lube on the rotor can ruin a brand new set. The rotor is metal and cleans up with isopropyl alcohol. The pads do not: contaminated pads cannot be cleaned back to full performance, and if cleaning the rotor does not fix the squeak, the pads need replacing. So the practical order is clean the rotor first, and if that does not resolve it, stop cleaning and buy pads. Handle new pads by the backing plate, and keep chain lube, polish and any aerosol away from a wheel with a rotor in it.

Timing tells you whether it is bed-in or contamination

A clever diagnostic that costs nothing. A bed-in problem is present from the very first ride, because the brake never had its friction layer. Contamination arrives later, and the tell is stated directly: pads were fine for a few days and then suddenly began squealing. So if the brakes were good and then went bad, do not go back and redo the bed-in, because bedding was not the problem. Look for what touched the rotor: lubricating a chain with the wheel in place, cleaning the bike with a spray, a greasy hand on a rotor while loading the bike into a car. And if new brakes still squeal after a correct bed-in, the likely culprit is the factory coating on the rotor, which wants cleaning with isopropyl alcohol before starting over.

A bike out of the shed has the same symptom for a related reason

Worth knowing because it presents identically and gets diagnosed as worn-out brakes. Guidance notes that loud and weak brakes particularly plague disc-equipped bikes that have sat unused for a period, because as pads and rotors sit dormant they glaze and harden, which is a leading cause of squeal. That is the same surface problem as a poor bed-in rather than wear, and it often responds to the same treatment. Glazed pads can frequently be recovered by sanding them lightly to expose fresh material and then bedding in again, which is a materially different outcome from contamination and worth trying before buying anything.

Know when to stop, and the number is about thirty

The most practically useful sentence in the sourcing, because it tells you when persistence stops being a virtue. If the brakes are not improving after thirty heavy heat cycles, something else is wrong, and it is time to consider an air bleed of the system and possibly new pads and rotors. Without that rule people either give up after four stops and conclude bedding does not work, or keep going for a hundred and glaze everything. Thirty cycles with genuinely no improvement is a real diagnosis: the problem is contamination, air in the system, or a mechanical fault, and none of those responds to more stops. Take it to a mechanic at that point rather than continuing.