# Recommendations for 29" tire for road/pavement/street **URL:** https://unicyclist.com/t/recommendations-for-29-tire-for-road-pavement-street/118547 **Category:** Unicycles and Equipment **Created:** [July 15, 2012, 5:10am UTC](https://unicyclist.com/t/recommendations-for-29-tire-for-road-pavement-street/118547 "2012-07-15T05:10:03Z") **Posts on this page:** 1 **Showing post:** 18
### Author: ![mad](https://unicyclist.com/letter_avatar_proxy/v4/letter/m/5daacb/32.png) [@mad](https://unicyclist.com/u/mad) #### Post date: [January 7, 2013, 11:47pm UTC](https://unicyclist.com/t/recommendations-for-29-tire-for-road-pavement-street/118547/18 "2013-01-07T23:47:17Z")
> [@pstrick](#): > > I’m a bit late to this conversation but having the road tire blow off my new 29" Oracle with the 42mm rim put me to searching the forums for help! When I ordered it I asked UDC to put the Big Apple 29x2.0 on for road riding. I have been very happy riding a Big Apple 26x2.35 on my 26" wheel so ordered one for the 29er. The new tire is rated up to 70psi, so I inflated to 65, and later that night I heard a loud bang (thought someone broke into the house!) which was the tube popping after the tire bead popped off the rim. I replaced the tube and slowly inflated to 40psi and I can see how the bead is getting pushed off the rim. I’ve read about this phenomenon in other threads ([Tire options on KH-29](https://unicyclist.com//t/tire-options-on-kh-29/73992/1)). > > My questions are: Will this be an issue with every 2.0" tire I put on my rim (such as the Marathon Supreme)? Will this happen (or be less likely to happen) if I get the 29x2.15 or the 29x2.35 Big Apple? I like to ride at higher pressures for speed/efficiency. It will be less likely to happen with the larger tires. I think the 2.35 BA would be fine on that rim, you might be able to get by with the 2.15 tire. In other threads people have commented that the 2.35 BA tire is more sensitive to road crown versus the 2.0 BA. However, if that hasn’t been an issue for you on the 26x2.35, then I wouldn’t expect it to be on the 29 either. Even with a bigger tire you might want to try lower pressure. Schwalbe claims that their “balloon” tires, such as the BA, roll as well at 2 Bar (~30psi) as a 37mm tire rolls at 4 Bar (~60psi). A 42mm rim is wider than you really want for a 2" tire, especially at high pressure. [This post](https://unicyclist.com/t/official-29er-tire-reviews-thread/112256/128) mentions two different Schwalbe 2.0" tires blowing off the even narrower (38mm) [Kris Holm 29" XC Rim](http://www.unicycle.com/unicycle-hardware/rims-and-custom-wheelsets/kris-holm-29-inch-36-hole-rim-xc.html) at 70 psi. The ETRTO compatibility chart below indicates that the recommended rim size for a 2.0" (50mm) tire is between 17mm to 27mm inside rim width. (Measurement B in the diagram.) Add 5-7mm to account for the bead hooks/sidewalls and you are looking at a 24mm to 34mm rim. Granted, the ETRTO recommendations will be somewhat conservative, but perhaps that’s because they have to consider tire/rim combinations that will be run at high pressure as well as low. (The chart and diagram are from [here](http://www.schwalbe.com/gbl/en/technik_info/reifenmasse/?gesamt=27&ID_Land=38&ID_Sprache=2&ID_Seite=141&tn_mainPoint=Technik).) Martin ![Screenshot.png](https://unicyclist.com/uploads/default/original/3X/2/3/2366a3efb781764501b4ff66d517451453bb7644.png) ![rim_dimensions.jpg](https://unicyclist.com/uploads/default/original/3X/c/0/c028742d80eb87da00aba6b49d33a6c117489260.jpeg) --- _[View the full topic](https://unicyclist.com/t/recommendations-for-29-tire-for-road-pavement-street/118547)._