'%3e%3cpath%20d='M41,17.5H30V11a5.006,5.006,0,0,0-5-5H7a5.006,5.006,0,0,0-5,5V23a5.006,5.006,0,0,0,5,5v2.09A2,2,0,0,0,10.417,31.5a.892.892,0,0,0,.1-.114L13.005,28H18v6.5a5.006,5.006,0,0,0,5,5H34.086l3.5,3.5A2,2,0,0,0,41,41.586V39.5a5.006,5.006,0,0,0,5-5v-12a5.006,5.006,0,0,0-5-5ZM12.5,26a1,1,0,0,0-.8.407L9,30.067V27a1,1,0,0,0-1-1H7a3,3,0,0,1-3-3V11A3,3,0,0,1,7,8H25a3,3,0,0,1,3,3v6.5H23a4.957,4.957,0,0,0-2.951.985l-3.139-6.9a1,1,0,0,0-1.82,0l-5,11a1,1,0,0,0,.5,1.324A.982.982,0,0,0,11,24a1,1,0,0,0,.91-.586L13.462,20H18.54l.071.155A4.939,4.939,0,0,0,18,22.5V26Zm5.131-8h-3.26L16,14.416ZM44,34.5a3,3,0,0,1-3,3H40a1,1,0,0,0-1,1v3.086l-3.793-3.793A1,1,0,0,0,34.5,37.5H23a3,3,0,0,1-3-3v-12a3,3,0,0,1,3-3H41a3,3,0,0,1,3,3Z'%20fill='%23fff'/%3e%3cpath%20d='M37,25H33V23a1,1,0,0,0-2,0v2H27a1,1,0,0,0,0,2h7.42a6.96,6.96,0,0,1-2.426,4.348A6.974,6.974,0,0,1,30.171,29a1,1,0,1,0-1.806.858A8.863,8.863,0,0,0,30.24,32.43a7.128,7.128,0,0,1-2.811.57.97.97,0,0,0-.965,1A1.031,1.031,0,0,0,27.5,35a8.932,8.932,0,0,0,4.52-1.23A9.127,9.127,0,0,0,36.571,35a.97.97,0,0,0,.965-1A1.031,1.031,0,0,0,36.5,33a6.949,6.949,0,0,1-2.72-.566A8.97,8.97,0,0,0,36.441,27H37a1,1,0,0,0,0-2Z'%20fill='%23fff'/%3e%3c/g%3e%3c/svg%3e){kind=small}
'%3e%3cpath%20d='M51.447,12.894a6.447,6.447,0,1,1,6.447-6.447,6.454,6.454,0,0,1-6.447,6.447m0-11.052a4.605,4.605,0,1,0,4.605,4.605,4.61,4.61,0,0,0-4.605-4.605'%20transform='translate(3759.075%20-297.591)'%20fill='%23fff'/%3e%3cpath%20d='M21.184,119.052a.921.921,0,0,1-.921-.921,9.2,9.2,0,0,0-1.835-5.929,6.792,6.792,0,0,0-5.534-2.361H9.21A6.791,6.791,0,0,0,3.677,112.2a9.2,9.2,0,0,0-1.835,5.929.921.921,0,1,1-1.842,0,11,11,0,0,1,2.255-7.1A8.659,8.659,0,0,1,9.21,108h3.684a8.66,8.66,0,0,1,6.956,3.032,11,11,0,0,1,2.255,7.1.921.921,0,0,1-.921.921'%20transform='translate(3799.47%20-394.539)'%20fill='%23fff'/%3e%3c/g%3e%3c/svg%3e){kind=small}
'%3e%3cpath%20d='M10.97,18.74a.913.913,0,0,1-.487-.141C6.568,16.134,0,11.212,0,5.942A5.949,5.949,0,0,1,5.942,0,6.658,6.658,0,0,1,10.97,2.348,6.658,6.658,0,0,1,16,0a5.949,5.949,0,0,1,5.942,5.942c0,5.27-6.568,10.192-10.483,12.657a.913.913,0,0,1-.487.141M5.942,1.828A4.118,4.118,0,0,0,1.828,5.942c0,3.122,3.324,7.041,9.141,10.8,5.818-3.759,9.141-7.678,9.141-10.8A4.118,4.118,0,0,0,16,1.828a4.594,4.594,0,0,0-4.176,2.618.914.914,0,0,1-1.7,0A4.594,4.594,0,0,0,5.942,1.828'%20fill='%23fff'/%3e%3c/g%3e%3c/svg%3e){kind=small}
'%20clip-path='url(%23a)'%3e%3cpath%20d='M29.737,167.485a2.742,2.742,0,1,1,2.742-2.742,2.746,2.746,0,0,1-2.742,2.742m0-3.657a.914.914,0,1,0,.914.914.915.915,0,0,0-.914-.914'%20transform='translate(-24.253%20-145.545)'%20fill='%23fff'/%3e%3cpath%20d='M155.737,167.485a2.742,2.742,0,1,1,2.742-2.742,2.745,2.745,0,0,1-2.742,2.742m0-3.657a.914.914,0,1,0,.914.914.915.915,0,0,0-.914-.914'%20transform='translate(-137.455%20-145.545)'%20fill='%23fff'/%3e%3cpath%20d='M18.282,18.283H5.484a.914.914,0,0,1-.909-.813L2.838,1.828H.914A.914.914,0,1,1,.914,0H3.657a.914.914,0,0,1,.91.823c.037.34,1.373,12.36,1.736,15.631h11.98a.914.914,0,1,1,0,1.828'%20fill='%23fff'/%3e%3cpath%20d='M48.056,46.97H32.923a.914.914,0,1,1,0-1.828H47.237l.621-5.589L31.81,37.824a.914.914,0,0,1,.2-1.818l16.961,1.828a.914.914,0,0,1,.811,1.01l-.813,7.313a.914.914,0,0,1-.909.813'%20transform='translate(-27.845%20-32.344)'%20fill='%23fff'/%3e%3c/g%3e%3c/svg%3e){kind=small}
NGK SPARK PLUGS - SPARK PLUG NGK JR8B - 21030331
13,31incl. VAT
'%20fill='%2369cc43'/%3e%3c/svg%3e)
Free pick up and return in our store- Free delivery from 150,-
- 30-day return period
- 10% discount on your first order
- 9.5/10 (62 reviews)
'%3e%3cpath%20d='M8.808,0c.2.489.374.935.552,1.382q.9,2.265,1.8,4.532a.23.23,0,0,0,.235.171c1.527.1,3.054.2,4.58.3l1.665.106c-.074.067-.117.107-.161.145q-2.31,1.959-4.623,3.915a.245.245,0,0,0-.1.291q.769,2.987,1.527,5.977c.013.049.022.1.039.178-.073-.043-.126-.072-.176-.1Q11.569,15.26,8.99,13.626a.287.287,0,0,0-.364-.005q-2.575,1.64-5.158,3.266c-.053.034-.108.065-.188.114.112-.446.217-.867.324-1.287q.62-2.438,1.246-4.875a.244.244,0,0,0-.1-.291Q2.434,8.586.12,6.619c-.038-.032-.08-.06-.12-.09L.021,6.49c.25-.018.5-.039.751-.055C2.6,6.316,4.422,6.2,6.248,6.084c.141-.009.168-.087.207-.184L8.715.217C8.738.158,8.764.1,8.808,0'%20fill='%23fbcd59'/%3e%3c/g%3e%3c/svg%3e)
Home'%20fill='%23001C36'/%3e%3c/svg%3e){kind=small}
NGK SPARK PLUGS - SPARK PLUG NGK JR8B - 21030331
NGK SPARK PLUGS - SPARK PLUG NGK JR8B - 21030331
- Superior construction for serious power
- NGK makes plugs for almost any type of application and riding style
- Versatile plugs with wide operating heat ranges prevent fouling from running too cool and preignition from running too hot
- Features include high-alumina ceramics for improved heat dissipation and electrical insulation, deep-seated copper core for a wider heat range and a nickel alloy tip for longer life
Specifications
| Brand | NGK SPARK PLUGS |
|---|---|
| Electrode Tip Material | Nickel Alloy |
| Ground Electrode Shape | Standard |
| Terminal Configuration | Threaded Stud |
| Ground Electrode Configuration | Single |
| Research Value | Finalized |
| Riding Style | Street |
| Hex Size Metric | 18 mm |
| Hex Size Imperial | 11/16" |
| Thread Reach Metric | 19.1 mm |
| Center Electrode Type | Standard |
| Thread Reach | 19,1 mm (3/4") |
|---|---|
| Style | JR8B |
| Units | Each |
| Product Name | Spark Plug |
| Model | Standard |
| Electrical Resistance | 5k Ohms |
| Hex Size | 18 mm (11/16") |
| Spark Gap | 0,7 mm (0,028") |
| Heat Range | 8 |
| Thread Size | 12 mm |
| Thread Reach Imperial | 3/4" |
Product reviews'%3e%3cpath%20d='M10.033,10.447c.192.232.358.222.55,0,.078-.091.147-.252.3-.217.486.113.41-.365.605-.555-.271-.306.031-.609.013-.918a.9.9,0,0,0-.277-.681c-.244-.23-.623-.408-.523-.858-.275-.189-.3-.662-.642-.71-.423-.06-.43-.312-.57-.618-.168-.368-.14-.558.138-.792.142-.119.163-.326.258-.484a1.11,1.11,0,0,0,.022-.67c-.053-.337.552-.106.405-.51a.366.366,0,0,1,.275-.448c.352.018.339-.281.391-.433A4.7,4.7,0,0,0,11.293.615c-.014-.157-.066-.253-.226-.224a.486.486,0,0,1-.5-.231c-.19-.239-.34-.185-.558,0-.1.083-.263.131-.4.217C8.743.944,7.865,1.507,6.969,2.042c-.391.233-.456.212-.58-.281-.07-.28-.369-.1-.407-.307-.034-.182.027-.362-.143-.536-.193-.2-.261.052-.355.039C5.321.934,5.459.639,5.266.589a.468.468,0,0,0-.291,0c-.33.154-.653.323-.971.5-.072.04-.113.135-.168.2.328.253-.189.457-.037.738.1.178.011.446.065.659.182.719.19.712-.493,1.044a3.175,3.175,0,0,1-.5.21,17.177,17.177,0,0,0-1.787.66A1.877,1.877,0,0,0,.029,5.622c-.075.174.023.27.009.351-.111.643.46.739.788.93a1.521,1.521,0,0,0,1.654.235c.075-.045.21-.09.263-.054.37.251.8.14,1.19.217.325.063.468.3.471.665,0,.262,0,.524,0,.939-.2.788.315,1.675.207,2.614-.033.283.174.445.472.479.171.019.43-.133.493.143.09.392.207.229.454.119.488-.219.8-.5.735-1.068a.364.364,0,0,1,0-.194,9.852,9.852,0,0,0,.786-1.836c.031-.1.154-.17.226-.114.436.339,1.207.151,1.391.907a.389.389,0,0,0,.465.269c.2-.048.3.1.4.223'%20transform='translate(0%20-0.001)'%20fill='%23fff'/%3e%3c/g%3e%3c/svg%3e)
0
/
5
out of 0
'%3e%3cpath%20d='M20.3,42.258H15.935a1.474,1.474,0,0,1-1.283-.762L7.158,28.135,20.3,38.013ZM1.321,18.856.575,20.175a4.448,4.448,0,0,0-.01,4.356L11.941,44.814a3,3,0,0,0,2.605,1.548h9.738V35.929Z'%20transform='translate(0%201.663)'%20fill='%23fff'/%3e%3cpath%20d='M34.31,42.267h-4.3l-.045-4.211,13.075-9.832L35.593,41.5a1.474,1.474,0,0,1-1.283.763m14.556-23.5L25.979,35.97v10.4h9.873a2.762,2.762,0,0,0,2.4-1.429l11.5-20.506a4.226,4.226,0,0,0-.016-4.148Z'%20transform='translate(2.291%201.654)'%20fill='%23fff'/%3e%3cpath%20d='M8.374,15.67,10.38,12.1l15.627,11.75L41.635,12.128l2,3.575L26.029,28.943ZM32.031,4.1l-5.9,4.439L20.026,4.1Zm11.6,3.2a1.122,1.122,0,0,0-1.659-.373L28,17.315v-5.1L39.448,3.607A2.069,2.069,0,0,0,40,.972,1.842,1.842,0,0,0,38.392,0H13.671a1.939,1.939,0,0,0-1.692,1.013A1.968,1.968,0,0,0,12.5,3.529L24.013,12.21v5.076L10.19,6.821a1.121,1.121,0,0,0-1.661.356L3.067,16.842l22.94,17.2,22.876-17.2Z'%20transform='translate(0.27)'%20fill='%23fff'/%3e%3cpath%20d='M20.3,92.415H15.935a1.474,1.474,0,0,1-1.283-.762L7.158,78.292,20.3,88.17ZM1.321,69.013.575,70.332a4.448,4.448,0,0,0-.01,4.356L11.941,94.971a3,3,0,0,0,2.605,1.548h9.738V86.086Z'%20transform='translate(0%206.085)'%20fill='%23fff'/%3e%3cpath%20d='M34.31,92.425h-4.3l-.045-4.211,13.075-9.832-7.449,13.28a1.474,1.474,0,0,1-1.283.763m14.556-23.5L25.979,86.128v10.4h9.873a2.762,2.762,0,0,0,2.4-1.429l11.5-20.506a4.226,4.226,0,0,0-.016-4.148Z'%20transform='translate(2.291%206.077)'%20fill='%23fff'/%3e%3cpath%20d='M8.374,65.827l2.006-3.575L26.007,74,41.635,62.285l2,3.575L26.029,79.1ZM32.031,54.259l-5.9,4.439-6.1-4.439Zm11.6,3.2a1.122,1.122,0,0,0-1.659-.373L28,67.472v-5.1l11.449-8.609A2.069,2.069,0,0,0,40,51.129a1.842,1.842,0,0,0-1.612-.972H13.671a1.939,1.939,0,0,0-1.692,1.013,1.968,1.968,0,0,0,.522,2.516l11.512,8.681v5.076L10.19,56.978a1.121,1.121,0,0,0-1.661.356L3.067,67l22.94,17.2L48.882,67Z'%20transform='translate(0.27%204.422)'%20fill='%23fff'/%3e%3cpath%20d='M20.3,142.573H15.935a1.474,1.474,0,0,1-1.283-.762L7.158,128.45,20.3,138.328Zm-18.976-23.4L.575,120.49a4.448,4.448,0,0,0-.01,4.356l11.376,20.284a3,3,0,0,0,2.605,1.548h9.738V136.244Z'%20transform='translate(0%2010.508)'%20fill='%23fff'/%3e%3cpath%20d='M34.31,142.582h-4.3l-.045-4.211,13.075-9.832-7.449,13.28a1.474,1.474,0,0,1-1.283.763m14.556-23.5L25.979,136.285v10.4h9.873a2.762,2.762,0,0,0,2.4-1.429l11.5-20.506a4.226,4.226,0,0,0-.016-4.148Z'%20transform='translate(2.291%2010.499)'%20fill='%23fff'/%3e%3cpath%20d='M8.374,115.984l2.006-3.575,15.627,11.75,15.628-11.717,2,3.575L26.029,129.257Zm23.657-11.567-5.9,4.439-6.1-4.439Zm11.6,3.2a1.122,1.122,0,0,0-1.659-.373L28,117.629v-5.1l11.449-8.609A2.069,2.069,0,0,0,40,101.286a1.842,1.842,0,0,0-1.612-.972H13.671a1.939,1.939,0,0,0-1.692,1.013,1.968,1.968,0,0,0,.522,2.516l11.512,8.681V117.6L10.19,107.135a1.121,1.121,0,0,0-1.661.356l-5.463,9.665,22.94,17.2,22.876-17.2Z'%20transform='translate(0.27%208.845)'%20fill='%23fff'/%3e%3cpath%20d='M20.3,192.73H15.935a1.474,1.474,0,0,1-1.283-.762L7.158,178.607,20.3,188.485Zm-18.976-23.4-.746,1.319A4.448,4.448,0,0,0,.565,175l11.376,20.284a3,3,0,0,0,2.605,1.548h9.738V186.4Z'%20transform='translate(0%2014.93)'%20fill='%23fff'/%3e%3cpath%20d='M34.31,192.739h-4.3l-.045-4.211L43.042,178.7l-7.449,13.28a1.474,1.474,0,0,1-1.283.763m14.556-23.5L25.979,186.442v10.4h9.873a2.762,2.762,0,0,0,2.4-1.429l11.5-20.506a4.226,4.226,0,0,0-.016-4.148Z'%20transform='translate(2.291%2014.922)'%20fill='%23fff'/%3e%3cpath%20d='M8.374,166.141l2.006-3.575,15.627,11.75L41.635,162.6l2,3.575L26.029,179.414Zm23.657-11.567-5.9,4.439-6.1-4.439Zm11.6,3.2a1.122,1.122,0,0,0-1.659-.373L28,167.786v-5.1l11.449-8.609A2.069,2.069,0,0,0,40,151.443a1.842,1.842,0,0,0-1.612-.972H13.671a1.939,1.939,0,0,0-1.692,1.013A1.968,1.968,0,0,0,12.5,154l11.512,8.681v5.076L10.19,157.292a1.121,1.121,0,0,0-1.661.356l-5.463,9.665,22.94,17.2,22.876-17.2Z'%20transform='translate(0.27%2013.267)'%20fill='%23fff'/%3e%3c/g%3e%3c/svg%3e)
Don’t miss any deals or updates!
Just like tens of thousands of other offroad enthusiasts, be the first to receive our daily deals and the latest products, exclusive offers only for newsletter subscribers, tips and inspiration for offroad fans, and much more. As a welcome gift, you’ll now receive 10% off your first order. You can unsubscribe at any time!
- Free pick up and return in our store
- Free delivery from 150,-
- 30-day return period
- 10% discount on your first order
- 9.5/10 (62 reviews)
'/%3e%3c/svg%3e){kind=small}
'/%3e%3c/svg%3e){kind=small}
'/%3e%3c/svg%3e){kind=small}
'/%3e%3c/svg%3e){kind=small}
Copyright 2026 - Hajo Trade
'%20fill='%23fff'%20fill-rule='evenodd'/%3e%3c/svg%3e){kind=small}