Man i ahve a Norco Rampage and use it to street bike and to do some Downhill. Me and my friend messed around with it and we bought a BMX cassette in the back and a BMX extra large chain and it fits right on. Since then whenever i do some dropouts it actually doesnt make a noise, before when i hoped off the sidewalk my derailer would make tones of noise. So its not only about thension its about all the noise those darn derailers make. SINGLE SPEED IS THE WAY TO GO!! and u got a pretty good deal off it. But i'm not sure waht u got for 100$ i got the chain for 10$ and the cassette for around 15-20$ and its pretty chill