Good mountain bike instructors never crash right? I wish that were the case, but the truth is, it is from my crashes that I have partially learned what not to do, and that is some of the most valuable information that I can pass on to my clients.
If I hadn't had the white helmet on (pictured at the very top of this page) when I crashed on an easy trail (a trail that the NICA kids race on), then I would probably be in a long-term care facility today. I'm not kidding.
If you buy a helmet with a detachable chin guard, then don't take off the face protection. That is like having a car with a great seat belt and not wearing the belt when you are only two blocks from home.
The next picture of the red and black Met is also telling. Had I not had this helmet on, I would have lost the lower part of my cheek, as you can see from how the scratches on the helmet go much lower than what a traditional cross country lid would cover. The helmet is cracked inside (not pictured), so it did its job; thank God. I have more stories than I can count of riders doing well in a crash when they had a helmet with face protection; and, unfortunately, I also have more stories than I can count of riders who did not do well in a crash with a half shell.
Don't buy a full downhill helmet with no or few vents unless you plan on using it for downhill instead of trail riding, regardless of how good of a deal you get on it, because it will be way too hot and heavy for trail riding or XC. I have worn 4 different brands of light duty full faces over the years, and the bottom line is I like the 7 Protection Project 23 Carbon for temperatures fewer than 70 degrees, and my Kali Invader or my Troy Lee Designs Stage when the temps are 70 degrees or higher because they both are substantially cooler than the 7 Protection. The Kali has even more vents than the TLDs, so it is the coolest of the three, but the 7Protection offers the most protection of the three. The saying when I was a kid riding moto was, "If you have a $10 head, then buy a $10 helmet."
2. Most bikes are too expensive not to have a bash guard to protect the frame and chain ring. If you are worried about dropping a chain, get this one. If not, then you can get this one. MRP makes the best bash guards; and I have run them on all my bikes for years. Bike Link is a local shop where you can purchase and have the correct bash guard for you bike installed.
5 On dropper posts, go with the most drop your frame will allow. SRAM AXS is my first choice, but I would bet that Fox has great wireless options also. Your local bike shop can help you find the right one to fit your bike.
6 I was always skeptical of bike fits when it came to a mountain bike, but John Karrasch has fit me on many of my mountain bikes, and I can tell a difference.
13 As for racks, I would choose the Kuat. I've also owned Yakima and One Up in the past. I have major concerns about how secure One Up racks are when mounted to the vehicle's hitch. They use a velcro strap. Plus, Kuat has much better customer service than One Up. Cahaba Cycles and St Matthews Cycling are two LBS that carry Kuat.