Q: Where to rent a decent mountain bike in Bail/Denpasar

I'll be for a week in Bali in February. I plan to use the week for a
nice tour on MTB, doing trips on Bail and Lombok. I've done several
tripsof this kind with my own bike on these islands, this means I do not
need a tour operator or guide, but I simply want to rent a good mountain
bike for a week. I'm well aware of the risk, traffic, the heat and so on
:-) ... Unfortunately, I cannot bring my own bike this time ...

I'll fly to and from Denpasar and my time is quite short, I want to
avoid spending a lot of time in the process of searching for a bike ...
I there hope for good tips from you:

Do you know any place where I can rent a good MTB for a week in the area
Kuta/Nusa Dua/DPS?

I can also imagine to start from Ubud, if it is easier to get a bike
there ... Price is not the main issue, I'd rather prefer to have a bike
in better condition than saving 3-5 US$ per week ...

Any hint is highly appreciated,

manfred