Complete guide to bottom brackets. It wasnt long ago that the only major bottom bracket decisions you had to make were shell width, spindle length, and, in rare cases, English BSA or Italian threading. Hammock Gear Top Quilts. Frequently Asked Questions. Hammock Gear makes some of the highest quality lightweight down top quilts for hammockers and ground dwellers. These days, it can feel as though there as many standards as there are bike brands, with every one of them supposedly being the best option. But fear not read on for our complete guide to the various types of bottom bracket available. Heres a rundown of each of the major bottom bracket systems currently available, along with advantages, disadvantages, notes on compatibility, and some input from their respective proponents on why they exist Conventional threaded. BB9. 0BB9. 5PF8. BB3. BB3. 0APF3. BBright. BB3. 86 EVOT4. Weve also included a section on how you can or cant as the case may be change between different bottom bracket standards and an explainer on why there are so many standards in the first place. Conventional threaded. Modern, external cup threaded bottom brackets arent exactly a new invention. In fact, their roots date back more than two decades to Craig Edwards old Sweet Wings cranks and Alex Pongs groundbreaking Magic Motorcycle. The idea is simple by moving the bearings outboard of the shell, you can then use a much larger spindle. Currently, 2. External bottom brackets for 3. White Industries. Shimano popularized the concept as Hollowtech II, with the introduction of the XTR M9. In fact, companies such as Santa Cruz continue to stand by it despite the plethora of other options. Top Gear Complete 19' title='Top Gear Complete 19' />Conventional threaded bottom brackets are still very popular, and for good reason. Canyon, for example, stuck with a threaded shell on its top end Ultimate CF SLX road frame until 2. Threaded bottom brackets are compatible with the largest range of cranks and some press in bottom brackets have a reputation for creaking, Santa Cruz global marketing manager Will Ockelton tells Bike. Radar.  Press in bottom brackets require special tools, which most consumers dont have and they can only be installed a few times before its recommended that you replace the bearings or cups ed. Most of our bikes come with ISCG tabs, but for the few that dont, a thread in bottom bracket still allows for chain guide mounting. A threaded bottom bracket is great because it isolates the bearing from the frameset, adds Matt Harvey, president of bearing, seal and bottom bracket maker Enduro. Because you have aluminum threads and surfaces, you can face the shell with a cutter and make it parallel if it is not. Top Gear Complete 19' title='Top Gear Complete 19' />The bearing bores are usually round already, with aluminum cups because it is a machined surface, and if the bearing bores are too tight you can sand them out and get the fit just right for the bearings before you thread them into the frame. You cannot use a facing or cutting tool that I know of in a carbon shell. Pros Easy at home service interface surfaces can often be machined huge selection of parts and accessories. Van Halen tshirts, apparel, books, collectibles and more. EVH gear and Eddie stripes shoes, shirts and accessories. Lots of exclusives. Cons Heavier than press fit systems frame design limited by relatively small diameter and narrow shell. Crank designs that will fit Standard 2. Shimano Hollowtech II, SRAMTruvativ GXP, Campagnolo Ultra Torque, FSA Mega. Exo, Race Face X Type, etc, square taper, ISIS, BB3. EVO, many others. Rod Stewart The Very Best Of Rar'>Rod Stewart The Very Best Of Rar. A note on other threaded bottom bracket standards. To make matters even more confusing, there exists a number of other threaded bottom bracket standards. Excluding the relatively new T4. Italian threaded bottom bracket. To keep matters simple, weve put together a simple explainer on this slightly esoteric of standards here. Cornell Note Taking Method Custom Pdf Generator Software. BB9. 0BB9. 5Trek introduced BB9. Madone and soon followed with the mountain bike specific BB9. Instead of having cartridge bearings that were pressed into aluminium cups that were then threaded into the frame, Trek eliminated the middle man and pressed the bare bearings directly into the frame. Bearing seats were moulded into the carbon frame structure to save weight, and bottom bracket shell width ballooned to 9. Treks BB9. 0 system uses the same bearings and bearing locations as a conventional threaded system, but eliminates the cups entirely. Bearings are pressed directly into precision molded carbon seatsThe most significant advantage is a stiffer frame, says Trek mountain bike product manager John Riley. Secondarily, BB9. It also provides a simplified installation process. Aside from omitting the cups, the BB9. Crankset compatibility is thus unchanged, although you do lose the ability to run chain guides that sandwich between the driveside cup and frame. This system is not without its issues, with shells becoming oversized a relatively common problem leading Trek to release the very slightly oversized V2 bearings to compensate. Pros Lighter than conventional setups but retains wide range of compatibility creates a wider BB shell without affecting crank width. Cons Cant use cup mounted chain guides shell is wider but still small in diameter requires a separate bearing puller and press for service. Crank designs that will fit Standard 2. A GXP conversion kit is also available. PF8. Very closely related to Treks BB9. PF8. 69. 2 standard used by Scott, Giant, Pivot, and many others. Once again, the bearings and their locations are identical to those of conventional threaded bottom brackets, only theyre mounted in small composite cups before being pressed into the frame. The advantages are similar to those for Treks BB9. From a manufacturing standpoint, PF8. BB9. 09. 5s, and its easier to adapt the system into alloy frames. So long as you have a concentric bore of the right diameter, parallel faces, and a proper shell width, youre good to go. PF8. 6s wider shell allows the chainstays to be pushed further apart a big advantage for cross bikes Because of this technology, were able to improve pedalling stiffness by about 1. Giant global marketing director Andrew Juskaitis. PF8. 69. 2 is less subject to tolerances, too, and is able to take up 0. Scott US marketing and PR director Adrian Montgomery touts similar reasons for his company choosing BB8. We can create frames with a wider bottom bracket shell, thus adding stiffness to the entire structure as the adjoining tubes can also be wider. We can do this without creating our own crank spindle standard because it adheres to the same spindle that a threaded BB uses. Its also lighter than a threaded BB because weve removed the alloy material that held the bearings outside the shell and it costs less to do a press fit bottom bracket in regards to manufacturing. Disadvantages None that I can see. Pros Same as BB9. Cons Same as BB9. Crank designs that will fit Standard 2. BB3. 86 EVOBB3. 0Several companies have dabbled in alternative bottom bracket standards over the years Gary Fisher, Klein, and Merlin, to name just three but it wasnt until Cannondale released its then proprietary BB3. BB3. 0s bearing cartridges press directly into a precision fit shell, as with Treks BB9. C Clips. But here its the shell and spindle diameters that increase in size, not the shell width. The key benefits are lighter weights owing to the larger, 3. Plus, because the shell is still just 6. Q factor. Proper BB3. The idea was that, since Cannondale had control of both the frame and crank manufacturing, we could use system integration to design a superior solution, even if that meant not relying on a traditional industry standard, says Cannondale vice president of R D, Chris Peck. Burrow 4. 0 Hammock Gear. Good so far by Unknown 2. Nov 2. 01. 7. Cant beat how light this is, and the fabric is comfortable on your skin. I havent tested the lower limits with this quilt yet but I have taken it on a couple trips and I am really happy with the product Unknown 1. Sep 2. I purchased this with the incubator 4. I was trying to lighten my load. It did just that with greater comfort. Quality is excellent. Aug 2. 01. 7. Overall impressive. Only issue is snaps used for footbox dont stay snapped. One doesnt work at all. Get the sewn foot box. Response from Hammock Gear If you havent already, please shoot us an email, wed be happy to fix those snaps or replace them for you. Steven Van Doeselaar 1. Aug 2. 01. 7. Very lightweight. Im 63 and have adequate coverage and when you feel the product on you and in your hands you can tell its made of high quality material. I cant say if the temp rating is there but so far Im in hammock happiness Perfect topquilt. Mike Taylor Treefrog. MT 7th Jul 2. 01. Im 6ft tall and the Normal length fit perfectly to my chin plus a couple inches for tucking at my shoulder. Temps were only down to 5. AT, and my Burrow 4. Even in very windy nights. When the temp rose to 6. I just used the quilt on my legs. Love it. Great quality, and no duck feather smell. Its totally worth every penny. Amazing product by Michael Trsinar 3rd Jul 2. As a previous owner of a Burrow 5. I am even more satisfied with the quality and comfort of my Burrow 4. The non sewn through design with 2 oz of extra stuffing really helps create the extra warmth. I will be a life long customer of Hammockgear productsDerek Desplinter 1. Jun 2. 01. 7. I liked my winter tq so much, I bought a 4. I got the snap footbox for versatility, and I love it I chose the long, wide because I like to tuck in if Im chilled and is easier to move around under without exposing myself to cold I am definitely not a warm sleeper most of the time. I liked the cinnamon color on the inside of my winter quilt, so got it on the outside on this one. Was interested to see the moss green, so got it on the inside and it is also a crazy cool colorThese quilts are so light, soft comfortable that I dont want to sleep with anything else May 2. I am truly amazed at how versatile this quilt is. Ive slept comfortably in a wide range of temps. Its easy to adjust if youre too hot, and itll keep you warm on those colder nights. On my last trip I was worried that I would have to night hike out because of how cold it got. It was 3. 3 degrees at about 9 pm and I had little to no faith that Id be able to stay warm. I moved the down to the middle and fluffed it up at the feet and with a little help from my jacket I stayed warm down to 2. Im so glad I bought this quilt and it will be my go to indefinitely. Light and warm, cant ask for more. Jarod 2. 7th Feb 2. I took my new burrow out to test it this last weekend. It got down to 2. I stayed nice and warm in my 4. At that point I had to crawl out of my hammock to relieve myself and when I got back in I decided to use a cheap down throw as another layer. When I woke up the next morning it was the birds that woke me up, not the cold. I really think if I hadnt needed to use the restroom, I probably would have never added that extra layer. Even with that, it still got me down to 1. For reference, I was wearing a long sleeve poly spandex shirt, t shirt and light fleece and long underwear with light zip off pants. Happy. by jshewmon 9th Jan 2. It dipped to 3. 5 on my last trip, didnt need to go for the thermals. Extremely happy with our quilt. Dave H. 3. 0th Nov 2. Ordered the hammock on November 1. Quilt was on my door step 8 days later. Excellent turn around time. Craftsmanship and fabric are top notch. Love the colors and the fact that it comes with a stuff sack as well as a cotton storage bag. Wife is very happy with her birthday present and Id have no reservations ordering from HG again. Fluffy Downy Awesomeness. Ricky. BHangin 2. Nov 2. 01. 6. Got the Burrow 4. Im very happy. I did a little testing in my backyard when it was just below 4. I can easily say Ill be toasty warm. This replaces my current 3. This is an amazing 1lb 2 ounces Next on the listThe accompanying incubator 4. Thanks HG Another awesome product from HG. Christopher 1. 4th Nov 2. This quilt is awesome. Very nicely put together and very warm. Ive tested it down to 5. HG 2. 0degree underquilt and was toasty and warm, nearly sweating. HG definitely is conservative with their temp ratings. Would buy again, every time. I went with the snaps, because that allows me to open the end a bit to vent if its warm. Packs down very small. HG includes a little stuff sac. Note that its not a compression sac, so you can squish it into odd voids your gear wherever it fits. I went with the longwide size since Im a big guy and the quilt weighs 1. Totally worth it. Excellent Service. Bron 2nd Nov 2. I ordered a Burrow 4. Charcoal greymoroccan blue. Service was amazing and Hammock Gear shipped the order in 2 days and I received the quilt 6 days later i am os. The quilt is everything I expected and more. Sizing is accurate and the finish is excellent I checked every seam. So far i have only used it for one overnighter but it kept me toasty warm at 4. We are coming into warmer weather right now and I hope to use the quilt on some other trips in the next few months. I highly recommend Hammock Gear for purchases and will be recommending them to all my backpacking friends. What else can I say Mark Blanchard 2. Oct 2. 01. 6. I agree with all them. Customer Service. P. Kelly 2. 4th Oct 2. I can not express my pleasure in doing business with the folks at Hammockgear. I wrote a simple email asking for some advice and they responded quickly and went well above and beyond anything that I expected. Hammockgear. com has earned a lifelong customer Austin 5th Oct 2. This TQ is the best quality I have seen. I also have one of the Under Quilts and it is great as well. This companys customer service is AMAZING I will definitely be doing business again. If you are in the market for high end hammocking gear, look no further. I did the research, let me save you the time. Just order from this company and you will be very pleased. True to temp rating. Darin Kramer Bansai 3rd Oct 2. First off thanks to hammock gear for another amazing product. Amazing and speedy customer service even thru their resent location move thumbs up H. G. Bought the 4. I will not be out hanging in the winter. T. Q. Came within 3 weeks of order placed. Which worked out great for testing purposes. The weekend it arrived it got down to the upper 3. I also got the 4. U. Q in this order 3. With Med weight bottom underwear, and light weight 14 zip top underwear, wool beanie and socks i stayed nice and warm. Im so excited to get out early spring next year to do so miles. And I know I will stay warm. Unknown 3. 0th Sep 2. Great product just what I ordered vary well built. The quilt was perfect. Nancy Martin 1. Sep 2. I had never used a quilt before, just a sleeping bag. Since I was backpacking in Romania, I needed something lightweight. Buying the Burro 4. Ive made in a long time. The quilt was warm, almost weightless just perfect. And the company was a pleasure to deal with. I needed my quilt in a hurry and they were able to accommodate me with size and delivery. This product is one of the best on the market.