Head tube - Tapered or not?

[Shenriet]

Guys can anyone help? I have a Silverback Vida 4 2013 model. I wanted to upgrade my fork this weekend, when i was asked if i want a tapered or straight head on the fork. I am unsure as to whether the silverback vida 4 head tube is tapered or straight..Tried to search on the web and couldn't find any info. Anyone have an idea on whether the 2013 model is tapered or straight??

[David Marshall]

You can see by looking at the bike. A "straight" head tube is the same size at both ends where the fork steerer protrudes (top and bottom). Both the headset cups are the same size. On a tapered steerer the bottom headset cup is larger than the one.

[rock]

its a straight 1 1/8" steerer tube