{"id":1062,"date":"2010-03-20T20:50:15","date_gmt":"2010-03-21T01:50:15","guid":{"rendered":"http:\/\/www.summet.com\/blog\/?p=1062"},"modified":"2010-03-22T09:17:14","modified_gmt":"2010-03-22T14:17:14","slug":"lightweight-urban-communter","status":"publish","type":"post","link":"https:\/\/www.summet.com\/blog\/2010\/03\/20\/lightweight-urban-communter\/","title":{"rendered":"Lightweight Urban Communter"},"content":{"rendered":"<p><a href=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2010\/03\/bike_sideview.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2010\/03\/bike_sideview-300x225.jpg\" alt=\"\" title=\"bike sideview\" width=\"300\" height=\"225\" class=\"alignleft size-medium wp-image-1063\" srcset=\"https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2010\/03\/bike_sideview-300x225.jpg 300w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2010\/03\/bike_sideview-1024x768.jpg 1024w, https:\/\/www.summet.com\/blog\/wp-content\/uploads\/2010\/03\/bike_sideview.jpg 1600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a> This is my new lightweight urban commuter (a.k.a. MARTA bike). I purchased a used carbon fiber frame, and a used mountain bike frame that had been made into a single speed road bike and combined all the parts (plus a few extra) into a lightweight single speed bike.  The frame is designed for road tires, and the clearance is very tight, so I am limited to a thin road tire on the back. <\/p>\n<p>The mountain bike frame came with a standard MTB crankset, and I&#8217;m using the middle gear (34 teeth) to a 16 tooth rear cog (4.3 gain ratio). This combination makes it easy to get to the MARTA station without too much effort (don&#8217;t want to arrive at work all sweaty). I have also experimented with using the larger (42 tooth) sprocket and a 15 tooth rear cog for a 5.7 gain ratio, but that combination only works in the winter when overheating isn&#8217;t an issue. Because it&#8217;s a commuter bike, I added a LED headlight (held on with a hose clamp) and a detachable RavX Super Sight bicycle taillight. The running weight is 18.6 lbs, or 21.2 lbs when I carry a U-Lock.<\/p>\n<p><a href=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2010\/03\/bike_front_closeup.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2010\/03\/bike_front_closeup-150x150.jpg\" alt=\"\" title=\"bike front closeup\" width=\"150\" height=\"150\" class=\"alignnone size-thumbnail wp-image-1064\" \/><\/a> <a href=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2010\/03\/chain_closeup.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2010\/03\/chain_closeup-150x150.jpg\" alt=\"\" title=\"chain closeup\" width=\"150\" height=\"150\" class=\"alignnone size-thumbnail wp-image-1065\" \/><\/a> <a href=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2010\/03\/bike_backview.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.summet.com\/blog\/wp-content\/uploads\/2010\/03\/bike_backview-150x150.jpg\" alt=\"\" title=\"bike backview\" width=\"150\" height=\"150\" class=\"alignnone size-thumbnail wp-image-1066\" \/><\/a><\/p>\n<p>Parts Details:<br \/>\nVitus Plus Carbone (Carbon Fiber frame) 55cm 21.6&#8243;  (1988)<br \/>\nVitus Dural 979 aluminum fork, Cinteli Stem, 26.4 Cinelli Bars<br \/>\nFront Wheel: Ritchey HB 575 Rim (26&#215;1.0 tire)<br \/>\nRear Wheel: Ritchey Hub ZER system, AERO OCR  wheel 6061 T-6 Alloy<br \/>\n                ETRTO: 622-14, Tire: Vlittoria Zalfiro 25-622 700x25c<br \/>\nShimano Ultegra 6600 brake on back, &#8220;Schwin Approved&#8221; calipers on front,  Tektro Reverse Alloy TT Brake Levers<br \/>\nShimano Bottom Bracket, Square Taper 68mmx118mm UN54<br \/>\nRavX Rear Flasher, Front LED light<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is my new lightweight urban commuter (a.k.a. MARTA bike). I purchased a used carbon fiber frame, and a used mountain bike frame that had been made into a single speed road bike and combined all the parts (plus a &hellip; <a href=\"https:\/\/www.summet.com\/blog\/2010\/03\/20\/lightweight-urban-communter\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":["post-1062","post","type-post","status-publish","format-standard","hentry","category-projects"],"_links":{"self":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts\/1062","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/comments?post=1062"}],"version-history":[{"count":0,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/posts\/1062\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/media?parent=1062"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/categories?post=1062"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.summet.com\/blog\/wp-json\/wp\/v2\/tags?post=1062"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}