Can I take over/purchase the bike at the end of the contract period?

Yes, you can take over the bike.

After the contract period, you will receive a purchase offer for your Dienstrad. If you accept this purchase offer, the Dienstrad belongs to you. The taxation of a possible monetary advantage, which results from the takeover price and the determined residual value of the tax authorities, is carried out by Deutsche Dienstrad for you, within the framework of §37b EStG.