Instead, consider one of our loadable dumbbell bars. Even with some extra plates, the total cost to make every increment up to 100 lbs won't be more than about $250, even less if you have lots of smaller plates in your gym already.
The bar shaft is 28 mm and well knurled like a regular bar, and the sleeves are long enough to load it up heavy.
Sold in singles.
5 stars for it's value. Bar is well built, sturdy, bushings are smooth and no slop anywhere, feels like a quality bar overall and should last.
My two came with slight manufacturing differences - the 1.8 cm in the dimension drawings were slightly different between the two bars, but it doesn't affect use and overall length/weight is the same.