Something unexpected has arrived in Happy Meal. Teenage Mutant Ninja Turtles and Hello Kitty and friends are teaming up for the ultimate collab.

Joining your little ones on a fun-fueled adventure. Some fun, some food, it's all inside this happy meal.

Until the 2nd of February from 11am includes one pre-selected book or toy whilst it's last.

This week we're resharing one of your favorite episodes from the single tracks podcast archive,

which now includes over 200 episodes. We'll be back in 2019 with a fresh slate of podcast interviews

and mountain bike topics for the new year. So, happy trails until then.

Hey, everybody, welcome to the single tracks podcast. My name is Jeff and today Aaron and

Greg and I are going to be talking about mountain bike drive trains. In this discussion,

we're going to start off talking about the pros and cons of one by versus two by and three by

drive trains because that's still a hot topic among a lot of

our readers. We're also going to talk about some of the differences between the different group

levels, so SLX versus XT and XTR and on the SRAM side, how the X rating system works for

them as well. And then we're also going to talk about

some alternative drive trains that are out there. So some of the geared drive trains that you

might have heard about. We'll talk about oval chain rings and also DI2. So let's jump right

into it and start talking about drive train configurations.

Greg and Aaron, how do you guys have your drive train set up?

I'm a one by for life.

I've got to tat it on my chest.

That's how about that one by life I am.

No, I prefer one by on my personal bikes, at least on my mountain bikes. I know that

Sram has done some one by drive trains for like gravel and road, but with the hills we have

...