Bicycle Rear Derailleur Tourney RD-TY300 6/7-Speed for MTB Mountain Bike Direct Mount

The Shimano Tourney RD-TY300 is a solid, budget-friendly rear derailleur for 6/7-speed mountain bikes. It offers smooth, reliable shifting for casual riding and commuting. Installation is easy, and it's durable enough for light trail use. However, it's not suited for aggressive riding or extreme conditions, and its weight and limited adjustability may not appeal to more serious cyclists. Overall, it's a great entry-level option for those on a budget. Great for the price and easy to install

This is at the low end of Shimano's derailleurs, but it's perfectly good for most bikers, including me.Some reviews have commented on how easy it is to install. I sort of agree, but confess that I put it on wrong at first. This is a screw-in derailleur (your bike needs to have a derailleur hanger, which most bikes do). But there's a little tab on the back side of the derailleur, which needs to go *above* a corresponding tab or ridge on your bike's derailleur hanger, so the top-most arm of the derailleur points back, more or less horizontally (my second picture), *not* down (like my first picture, the one labeled "wrong").I also had trouble threading the cable through the clamp. I'm not sure what was going on, but it appears the clamp can get stuck so it won't clamp down on the cable, or alternatively so you can't feed the cable through the clamp. Both happened to me. When the clamp was stuck in the closed position, I took the nut off entirely and the clamp was still jammed. I finally knocked the screw out, at which point the clamping piece came off and I was able to put it back together and thread the cable, then tighten the nut. Much easier to work on this with the bike upside down, so you can see what you're doing.Once you've got that right, the rest should be easy. I of course needed to adjust the H screw (the one on the right as you're looking at it on the bike--it's almost impossible to read the little H and L labels) out a couple turns before it would line up with the high (smallest) gear and make the shift into that gear smoothly. I also needed to play with the L screw (the one that adjusts shifting into the lowest gear = the largest sprocket).You'll find on-line instructions for all this, plus the adjustment on the B screw. The manual named "Shimano WH-MT68-R12 Wheel Dealer's Manual" contains the instructions for this derailleur (this is the "Standard type", using a derailleur hanger on the bike, not the "bracket type").

The great thing about modern derailleurs is that the cheap ones work almost as well as the expensive ones, but are maybe a bit less durable, and quite a bit heavier. This one is made from what looks like a combination of forged aluminum and stamped steel.I got this just to keep in my parts bin as a spare for my budget e-bike. Many lower-end e-bikes (including mine) use this derailleur, with a Shimano SIS indexed shifter, and a seven-speed freewheel. On an e-bike, weight is not important. You also tend to shift less often on e-bikes, so it could last quite a while. My experience is that it has worked well for the first thousand miles. And with a cost under $20, I won’t cry if it gets bashed up a bit in use. I’ll just replace when necessary.

The media could not be loaded. As an avid cyclist, who is focusing on riding more often, I wanted to repair an older bike to use as my ‘townie’ (quick trips to the store or errands that are close to home) so I didn’t stress about the bike getting stolen or being the target of theft. So, when I had the opportunity to repair/fix an older bike that needed a new derailleur that mounts directly to the frame, I jumped at the chance. After some research, to make sure the replacement would work, I ordered this Tourney RD-TY300 6/7-Speed derailleur. Here’s my take on it:Installation Ease: The installation process was straightforward, especially since the derailleur attaches directly to the frame just like the old one. It was a breeze to replace the old Deore DX derailleur, which had too many miles and abuse under it. With a few Allen Tools it was a simple process (refer to photos) (watched some videos online to see how to do it).Design and Functionality: The larger idler/jockey pulleys are great and a design improvement over the older models. These pulleys are supposed to contribute to a modern derailleur’s performance and I’d have to say, from my experience, that’s true. The shifting is crisp and even, with low pedaling resistance, making for a smooth ride. I included a video of 'pedaling in place' - a few of the shifts there's a bit of chain 'jump' but that's because I need to fine tune it and I think the chain likely needs replaced - it's not a function of the derailleur at all...I'm not a pro bike mechanic:)).Build Quality: While it doesn’t quite match the ‘bulletproof’ reputation of the Deore DX (which was kind of legendary 20-30 years ago), it’s still very sturdy. The allen wrench screws fit perfectly, and the overall construction and machining of the components feels solid and, frankly, better than I expected for the cost of the derailleur.Value for Money: There’s little doubt this derailleur offers great value. I’m assuming it will last for a long time to come and if it doesn’t I’ll return to this review and edit it accordingly. But, after a week of riding, it seems fine and I don’t foresee any issues. It’s a cost-effective solution for those looking to repair or fix, maybe even upgrade, their bike without breaking the bank.Room for Improvement: The only drawback I found was the absence of a simple instruction manual. A quick guide indicating the high and low limit screws would have been helpful for novice bike mechanics like myself (I literally know almost nothing about derailleur maint.).Final Thoughts: Overall, the Bicycle Rear Derailleur Tourney RD-TY300 6/7-Speed is a commendable replacement that offers reliability and performance. It earns a solid 4 out of 5 stars from me, missing out on perfect 5 out of 5 because I’m comparing it with the very robust Shimano Deore DX and it lacked any instructions which, as I said, would have been a nice convenience. Nevertheless, I am pleased with the derailleur and I’d recommend it. **be sure to check to make sure it’s compatible with your application/bike. I hope this review helps you or others considering this product. It’s always good to share personal experiences to assist fellow enthusiasts in making informed decisions about a hobby I love. Happy cycling!

Installed this on an 1980's Trek 800 Antelope. More difficult to get the old derailleur off than getting this one on. The original one had a strange spring clip that was difficult to extract.Works well, other than an issue with my original shifter is making it difficult to adjust for the lowest (largest) gear on my cassette. Not the fault of this derailleur.