Origin8Single-Ring Chainring Bolts

Bought these for my 6ku track. Bike after changing the chainring to a vuelta 39t and mounting it on the inside of the crank. The original chainring was mounted on the outside but I switched my rear wheel to a coaster brake so in order to get the chianline straight, I mounted it on the inside as recommended by my LBS. This made the chainring bolts sit in a groove on the backside of the chainring thus requiring shorter bolts in order to even tighten down the bolts. I first grinded the female sides of the original stock 6ku bolts shorter to get them to tighten however for some reason, the 6ku bolts are slightly bigger than my metric multi tool. Maybe they are imperial? Anyway, I rounded one of the 6ku bolts so I required ordering these, even though my diy grinding fix worked well enough. To be fair, I could have flipped the vuelta chainring over, and the bolts would be spaced farther, but like I said, I rounded one so it was unusable. Plus I would like to see the brand on the outside.After receiving the origin 8 bolts I noticed they were higher quality and very hard and dense feeling. Smooth mirror like finish on the chrome. Definitely higher quality than the 6ku ones, and guess what...they fit my multi tool Allen key perfectly. I’m not sure why the 6ku ones are so loose but my LBS guy told me they skimp on little parts to save money rather than using the proper spec parts.Just a really cool trick I did was to sandwich some steel wool behind the female side of the chainring bolts so that when I tightened them down, they didn’t just keep spinning in the slot. It took me 2 hours to figure this trick out. Before that was using all kinds of tools to try and stop the female side so I could fully tighten the male side. Steel wool worked great. I almost ordered a “special” chainring bolts tool. No need. Just get the female side to stay somehow and use grease on the male bolt. For 6 bucks these are worth it and absolutely an upgrade. From what I was told by the bike mechanic and researched...you absolutely don’t want your chainring loose at all. It will wear your chainring much faster and make weird noises. Don’t skimp here. Shipped fast as well.

What's not to like? They're affordable, robust, and get the job done. When you require an emergency chainring bolt, you must have a spare. There are no workarounds for this when you're miles from home.I just have to say that the weight is noticeable from a packaging standpoint. When I lifted the chainring bolt card out of the package, I noticed they had some weight. That's ok since these are made of steel and are more affordable than aluminum bolts. I know this is negligible, and I won't notice a weight change on my bike overall. I will purchase again.

These are very good quality steel bolts, but they’re too small for my 1x setup.I’m running Shimano Zee cranks with an FSA chainring and would ideally use chainring bolts with a 6mm nut shaft length, since the Zee crankarm spiders are very thick at over 4mm.The Origin8 nut shaft is only 4mm long, way too short, the bolt threads barely engage the nut, and very little of the nut’s shaft engages the spider. The bolt threads are 6mm long.I still give these five stars, they may be a good fit for a setup with a thinner chainring + crankarm combo.The quality is good and the price is right, and these are made in Taiwan, not China.

I bought these to support my single speed conversion of a 1977 fuji S-10s. Originally I had set up the drive train to use the 42t inner front chainring, and just left the 52t chainring in place. I started to have chain launching issues, and realized it was because the cog in the rear was more aligned with the outer 52t chainring. To test this, I ran on the outer chainring for a couple weeks and experienced no chain launches, but 52x16t was a bit high.I couldn't simply swap the front two rings because the 52t front ring wouldn't fit on the inside track. Thus I simply removed the 52t chainring, and mounted the 42t ring to the outside position. To do this I needed these single bolts because my existing bolts were too wide (to accommodate two chainrings). These worked great and I've had no issues so far.Update: I lose a couple of these each season it seems like. Use loctite. Haven't had any issues with them physically failing, just vibrating loose over the course of the summer. It's tougher to catch before they fall off since there's less thread. Seems that I lose them within a day or so once they finally come lose.

Pretty much just chainring bolts. They're good quality and made my bike look a bit nicer (black bolts blend in with my black chainring)

Old ones were loose and squeaky. Fixed the problem.

Needed black bolts for a single speed chain ring

I’ve built many 1x conversion bikes. Early on I was fixated on building bikes with as little weight as possible and opted for aluminum. Rookie mistake! The aluminum bolts are so easy to strip, round, or simply break. The steel ones still weigh virtually nothing and are many times stronger (also more affordable). Even with a torque wrench you can easy break aluminum chainring bolts because they are just so small. Get the steel ones and save yourself any issues.