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."
The Shimano Ultegra 6800 front derailleur brings 11-speed to the Ultegra family with improved performance over 6700 Ultegra. Delivers both a shorter stroke at the lever and reduced effort with a revised actuation ratio.
Reviews
Find Best Price at Amazon"So, you will need a narrow chain pin when you do the install."
"The only down side is the waiting period, took a good while before I received!"
"Perfect replacement."
"Item was exactly as shown and shipped promptly, will use again."
"The best front shifting you could ask for."
"Shimano has the best quality!"
"Quality Shimano Derailleur."
Wide pivots create a rigid structure that ensures assertive shifting and longer pivot life. Total gear teeth: 48. Enter your model number to make sure this fits.
Reviews
Find Best Price at Amazon"Deore is the beginning of Shimano's "enthusiast" MTB and Trekking lines - heavier than it's SLX and XT older brothers, but similar durability."
"The cage is riveted shut, so you'll have to pop your chain apart to feed it through, which is a little annoying, as I've had derailleurs where you could unscrew the plates and slot the chain in that way."
"I had replaced the rear derailleur and chain on my project bike, a 20-year-old full springer Specialized Ground Control AIM mountain bike."
"I knew it wasn't going to work properly due to my chainline being ridiculous but I was in a pinch and needed something fast so I bought this."
"This will work as long as your willing to replace. the wider 8 speed chain with a narrower 9 speed chain."
"Make sure that the clamp fits your seat tube and the cable routing is compatible with your frame."
"This derailleur was easy to install and tune by myself."
"This will GREATLY improve your drive train performance."
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."