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Diamondback Adult Insight STI-8 Performance Hybrid Bike 2012

$599.97 $649.99*
Save $50.02 (8%)
Diamondback Adult Insight STI-8 Performance Hybrid Bike 2012 - Dick's Sporting Goods
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  • Gloss Black
Size Chart
  • 15
  • 17
  • 19
  • 21
  • 23

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Standard Ground Service Available (normally $41.91)

Product Information:

Free In-Store Bike Assembly when purchased online or in-store. Click link below for details.

The Diamondback® Adult Insight STI-8 Performance Hybrid Bike turns it up a notch with high performance and versatility. A Shimano Nexus internally geared 8-speed hub and single front chain ring creates a smooth gear transition. Add in a Shimano 8-speed twist shifter and Weinmann double wall alloy rims, and you've got the ultimate machine.
Click here to learn more about Free In-Store Bike Assembly


  • Butted 6061-T6 aluminum insight performance hybrid frame
  • Perfect for riding on trails or pavement
  • Insight integrated alloy Aero straight blade fork
  • Single gear crankset with integrated chainguard
  • Shimano Nexus 8-speed with Nexus twist shifter
  • Weinmann double wall alloy rims


  • Frame sizes:15", 17", 19", 21", 23"
  • Fork: Insight integrated Aero alloy straight blade
  • Headset: Integrated "Cane Creek" size drop-in ACB 1 1/8"
  • Cranks: Alloy single chainring with alloy chainguard 38t
  • Bottom bracket: Sealed cartridge
  • Front derailleur: N/A
  • Rear derailleur: N/A
  • Shifter: Shimano SL8S-20 light action, 8-speed, twist
  • Cogset (Casset/Freewheel): Shimano 18t sprocket for internal gear hub
  • Chain: KMC-Z51
  • Front hub: 32h alloy QR
  • Rear hub: 32h Shimano Nexus internal 8-speed
  • Spokes: Black 14g stainless steel
  • Rims: 32h Equation R23 doublewall
  • Tires: Kenda Kwick Trax with puncture resistant K-shield 700x32c
  • Brakes: Alloy linear
  • Brake levers: Tektro RS with reach adj.
  • Pedals: Wellgo alloy body/cage, toe clip compatible
  • Handlebar: DB 31.8mm low rise alloy
  • Grips: Avenir Ergo 3-D comfort
  • Stem: DB 3D Forged 7 31.8mm
  • Seat: DB Performance Hybrid with gel
  • Seat post: Alloy micro adjust 27.2mm
  • Extras: Owner's manual, chainstay protector, clear coat, H20 bottle mounts

NOTICE: Used Bikes and/or bikes purchased online that have been assembled are non-returnable.

We strongly recommend that a professional bicycle mechanic properly assembles, repairs, and maintains the bicycle. DICK'S Sporting Goods will provide free in-store assembly service by a certified technician for any bicycle purchased on our website or in our stores (proof of purchase required). If you choose to assemble the bicycle yourself, DICK'S Sporting Goods is not responsible for injuries or damages resulting from improper assembly.
Country of Origin: China
Web ID: 12256902

Customer Reviews:

Diamondback Adult Insight STI-8 Performance Hybrid Bike 2012 3 5 2 2
well... If a bike tech builds it then its covered. If you put it togeather yourself then it isn't because not everyone knows how to do so to spec. There is info in the box that states this. second. Where were you riding this bike? off road? country road? How heavy are you? There are reasons the bike would fall apart other than it being a "bad build".Ive have many dif bikes including Diamondback and none have ever fallen appart on me because i use them on what they were designed for. June 29, 2013
Good for about 600 miles First off, the bike was great. I ride 18 miles each way to work and this bike did the job. It shifts well (although every once in a while it shifts a little hard but still better then a derailleur). It has frame mounts for a water bottle cage or bike pump in two places (although I don't think you can do two water bottles as the mounts are too close together). Info I could not find elsewhere: It has presta valves. I know that's expected on a tire this thin (32) but I couldn't find it anywhere for certain. It does have mounts for a rear rack. This would have been good info to know since I bought my rack without knowing, and so i bought one that clamps onto the seat post. Ah well. Caveat 1: The biggest downside to me is the threadless stem. This means you can't adjust the handlebar height easily. You need to buy a riser or riser handlebars. This isn't awful, just something worth noting. Caveat 2: It only has eight gears, but that's more than enough for me since I'm in the flat valley of Phoenix, AZ. I've never used 1st or 2nd gear. If I were in a hilly area I might add a Patterson Metropolis Transmission like someone else mentioned on here, but maybe the 1st and 2nd that this already has is enough. I just don't know because I have no hills to try it on :) Make sure you check diamondback's website for fitting. Bikes are NOT one size fits all. If you're looking for a simple bike that will get you from point a to point b reliably, here it is. BTW, compare the 2012 stats to the 2013 on Diamondbacks website and you'll find this is the EXACT same bike. The 2013 just got a new paint job. I kind of prefer all black anyway, so saved a couple hundred by getting "last" year's model. Update: I thought my shifter was bad, but turns out it just needed to be adjusted. And it was REALLY easy to adjust. I attached a video that shows a yellow line down on the internal hub. You have to line up two yellow lines while in 4th gear for your bike to shift properly. You line them up by spinning the little black adjuster screw thingy that is right under your shifter. I showed that part at the end of my video. Shifts like a dream again. I had to take away a star though because of Diomandback's customer service. The bike is just as wonderful as always, but when I called to try and see what to do about the shifter (thinking it was broken) they proceeded to tell me I had no warranty because I didn't buy it from an authorized seller. I did get transferred to the people who usually handle online warranty claims. I left them a message and NEVER heard back. Turns out it was a simple fix, but I did discover that if something does breaks I'm out of luck, and even if I did have a warranty, they don't return phone calls.... Update II: So the bike literally started falling apart.... Spokes are breaking on this like they are made of plastic. I haven't even put 1000 miles on this. A bike should last at least 1000 miles if you pay this much.... I'm sorely disappointed with this bike. I bought Diamondback because I'd heard great things about them. Now I find that the build is bad, and they don't stick behind their warranties, but instead hide behind the, "You don't have a warranty because you didn't buy it from an authorized re-seller." I have found nowhere in the paperwork from their own manual that says you have to buy from an authorized re-seller. Ah well, you live you learn, you don't buy Diamondback again.... March 24, 2013
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