Best Bike Derailleurs
Wide link design increases durability and precise shifting. Shifter/Rear Derailleur : Shimano, Speeds: 8sp, Weight: 326g.
Reviews
Find Best Price at Amazon"This is working very well as a replacement for my bike so far."
"Giving this derailleur 5 stars for value."
"If you want a poorly-shifting but period-correct derailer, then go get a deer head derailer from ebay."
"I put this on my 1998 Giant bike 21 speed that I had rode until I wore it out and put it away for 10 years."
"Very crisp and positive shifting and no adjustments were made after installing it on my Schwinn tourist, just popped it on there and tightened down the cable nut and shifted great I did however had to set the limit screws as usual but no biggie!"
"This is probably the best derailleur your going to get under $20."
"Good replacement for my original Altus part on my older 21 speed even though the idler pulleys on this one. are a bit bigger it shifts very smooth and accurately, after proper setup of course."
"5 stars based on the performance you get from a derailleur that is less than $20."
New Rear Derailleur The latest version of RD-TZ30 31. Bike Type: MTB，road bike. materials:High quality plastic and alloy. Model:TZ 31-21. Classification:TZ31 eye poking a. Speed: 6/7 SPeed. weight:about 265g. Direct mount mainly used in aluminum alloy bike frame. Enter your model number to make sure this fits.
Reviews
Find Best Price at Amazon"The only drawback is I need to make minor adjustments every 3 or 4 rides."
"I purchased for my sons bike as he dropped his bike on the old derailleur."
"This didn't really fit my bike as my threaded attachment was stripped."
"I purchased a 21speed mongoose and this piece broke like splitting a double popsicle."
"Put this on a Walmart Mongoise mtb that a a crunched rear derailleur."
"Inexpensive, but probably will last 3-4 years."
"The Shimano tz31 was delivered on time and in excellent condition.I purchased this part for the Mongoose Ledge Bike and it fits perfect."
"I bought this to replace the one on my Mel's bike that broke and he used it a month and it broke again... Now I have to but another."
It's direct-attach and features advanced Shimano technologies, like Advanced Light Action design and low-friction link pivot bushings for crisp, smooth and reliable shifting. Enter your model number to make sure this fits.
Reviews
Find Best Price at Amazon"Big test will come in a couple weeks but early indications are it will be an improvement for a third the cost of the real "nice" mountain bike drivetrains."
"Have been fighting with indexing gears for ages due to the Barrel Adjuster screw Threads Not Cut Straight."
"Bought my kid an older 24" Rockhopper that the rear derailleur was shredded."
"Great replacement for any 7-8 speed bike Dials right in.String a new cable get the housing cut right+Lube the shifter.A little axle lube on the inner spring {2-Dabs}.Oil the pivots and should last longer."
"I replaced the L and H adjustment screws with M4 X 12mm socket head screws and now it is easy to adjust ."
"I received the Acera derailleur thinking it will only be a slight improvement over the Tourney derailleur series."
"Great replacement mech."
"Converted 7 speed freewheel to cassette on mountain bike worth keeping."
Best Front Bike Derailleurs
Shimano Tourney front derailleur dual pull and works on mountain double or triple drive trains. Dual Pull Design: Compatible with top or bottom routing.
Reviews
Find Best Price at Amazon"The derailer that came with the bike was easily bent and poorly functioning to start with. Make sure to match up the adhesive diagram on the derailer with the big chain ring teeth and pull the wire up and around and through the black plastic groove and down into the screw to compress the wire."
"Add a weak shifting spring to the mix and you have a derailleur that makes clicking noises when attempting to shift to Granny on the Front Chain ring while it's still on high on the Freewheel...When you can get a front Derailleur that is strong enough to cover up for your mistakes and actually FORCE the chain to jump when it's way out of line you can smile about it..I keep up bikes for kids who do just that."
"Bought this to replace C101 front deraillleur on Trek hybrid."
"i would put this on my high end piece anytime without fear."
"This works great on my bicycle."
"suitable replacement for OEM derailleur."
"It would have been nice if they had a way to open the slot instead of breaking the chain to pass it through during install."
"Did not include full set of spacers, and consequently does not fit."
Best Rear Bike Derailleurs
It's direct-attach and features advanced Shimano technologies, like Advanced Light Action design and low-friction link pivot bushings for crisp, smooth and reliable shifting. Enter your model number to make sure this fits.
Reviews
Find Best Price at Amazon"Have been fighting with indexing gears for ages due to the Barrel Adjuster screw Threads Not Cut Straight."
"Bought my kid an older 24" Rockhopper that the rear derailleur was shredded."
"I received the Acera derailleur thinking it will only be a slight improvement over the Tourney derailleur series."
"Converted 7 speed freewheel to cassette on mountain bike worth keeping."
"Worked great on my bike though not the actual part needed."
"Shimano Acera is an excellent derailleur for low to midrange bicycles."
"Very pleased."
"worked as a replacement for my m340, the adjustment screws are in a bad place on this derailer, but hopefully you wont have to make many adjustments to this component."
Best Bike Shifters & Parts
Shimano has spent countless hours researching and developing shift cables and housing that will optimize the performance of their shifters and derailleurs. Enter your model number to make sure this fits.
Reviews
Find Best Price at Amazon"The housing isn't long enough to replace both the front and rear cables."
"Worked well however you do need special tools to cut these."
"great quality cables and housings."
"No longer have to kick rear derailleur with right heel to aid in shifting."