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BIYDOO Bicycle Rear Derailleur RD-TY300 6/7-Speed for MTB Mountain Bike Direct Mount
BIYDOO has been focusing on the bicycle industry over 8 years. Just to bring you a perfect riding experience.
Features:
- Compatible with 6 and 7-speed SIS Index Shifting drivetrains
- Forged with high hardness aluminum alloy,sturdy and durable
- Smooth shifting, Bracket fit (under wheel nut) Long cage tourney derailleur
Application
Suitable for variable speed bikes, mountain bikes, road bikes, folding bikes, city bikes, tricycles, and more.
Rody
Reviewed in the United States on September 12, 2024
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.
Jeff Schneider
Reviewed in the United States on August 27, 2024
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.
Michael B. Maxwell
Reviewed in the United States on July 11, 2024
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").
Eddy
Reviewed in the United States on June 11, 2024
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Dhyana Wallace
Reviewed in the United States on October 24, 2024
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
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