dumbbell progression question

[pyros]

I have a problem cause Im lifting now a 17.5 kg dumbbell to train my biceps doing a max of 12 reps, but the next dumbbell weights 20 kg and is just too much for me. I can maybe do one or two reps before my arm breaks.
So...how do you solve this problem?

I've thought about using a machine instead of the dumbbells cause there I can increase the weight in a progressive way like: 17 kg, 18, 19... so its ok, but with the dumbbels...a 2.5 kg jump is just too much.

Solutions please?

 

[Fireballs]

Slower reps or use an ez curl bar.

 

[ErnestHenley]

Use it as a max lift first and then continue onto your normal dumbells i.e. do max reps of 20kg (2x) then the rest (10x) using the 17.5. Aim to progress by one or as many reps as you can with each coming week. Alternatively alternate your grip and turn it into a hammer curl and incorporate more forearm muscle action.

Fireballs suggestion of an ezy curl bar is good. You can also use the cable machines, barbells, smiths rack or even the good old chin ups to mix things up.

 

[LorenzoVonM]

There are a number of ways to achieve progressive overload. I lifted this off the following: http://bretcontreras.com/progressive-overload/

Lifting the same load for increased distance (range of motion)
Lifting the same load and volume with better form, more control, and less effort (efficiency)
Lifting the same load for more reps (volume)
Lifting heavier loads (intensity of load)
Lifting the same load and volume with less rest time in between sets (density)
Lifting a load with more speed and acceleration (intensity of effort)
Doing more work in the same amount of time (density)
Doing the same work in less amount of time (density)
Doing more sets with the same load and reps (volume)
Lifting the same load and volume more often throughout the week (frequency)
Doing the same work while losing body mass (increased relative volume)
Lifting the same load and volume and then extending the set past technical failure with forced reps, negatives, drop sets, static holds, rest pause, partial reps, or post-exhaustion (intensity of effort)