These are more bulky than steel plates so not easy to fit desired weight on a hand bar bell. They come with filler already installed in heavy plastic shell.
Just got the bike the beginning of January and use it practically every day. I like the high back for support and the larger seat as opposed to a traditional bicycle seat. It serves it purpose, to exercise my surgical knee and my heart. I would definitely recommend this unit if you do not want to spend mega-bucks on a bike. My sister had knee surgery also and it was recommended to her to ride a stationary bike. She loves her bike also.
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